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1. Transcriptional alterations in glioma result primarily from DNA methylation–independent mechanisms

Author

Mélanie Müller-Barthélémy, Elisa Le Boiteux, Franck Court, Julian Biau, Lucie Karayan-Tapon, Toufic Khalil, Pierre Verrelle, Philippe Arnaud, Jean-Louis Kemeny, Anne Fogli, Catherine Vaurs-Barrière, Bruno Pereira, Emmanuel Chautard, Génétique, Reproduction et Développement (GReD), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Biochimie et Génétique Moléculaire [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand, Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER, Thérapie ciblée combinatoire en Onco-Hématologie (EA3846), Université d'Auvergne - Clermont-Ferrand I (UdA), Unité de Biostatistiques [CHU Clermont-Ferrand], Direction de la recherche clinique et de l’innovation [CHU Clermont-Ferrand] (DRCI), CHU Clermont-Ferrand-CHU Clermont-Ferrand, Imagerie Moléculaire et Stratégies Théranostiques (IMoST), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Laboratoire de pathologie, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], Institut National de la Transfusion Sanguine [Paris] (INTS), Arnaud, Philippe, Institut de Génétique Moléculaire de Montpellier (IGMM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Génétique, Reproduction et Développement - Clermont Auvergne (GReD), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), Service de Biochimie Médicale et Biologie Moléculaire [CHU Clermont-Ferrand], Centre Jean Perrin, CRLCC Jean Perrin, Unité de biostatistiques, CHU Clermont-Ferrand-Hôpital Montpied, Imagerie Moléculaire et Stratégies Théranostiques - Clermont Auvergne (IMoST), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne (UCA), CHU Clermont-Ferrand-Hôpital Gabriel Montpied, Service de Neurochirurgie [CHU Clermont-Ferrand], ANR-16-IDEX-0001,CAP 20-25,CAP 20-25(2016), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Adult, Male, Jumonji Domain-Containing Histone Demethylases, Transcription, Genetic, [SDV.CAN]Life Sciences [q-bio]/Cancer, Biology, [SDV.BBM.BM] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, medicine.disease_cause, Epigenesis, Genetic, Histones, 03 medical and health sciences, 0302 clinical medicine, [SDV.CAN] Life Sciences [q-bio]/Cancer, Cell Line, Tumor, [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], Genetics, medicine, Humans, transcriptional defects, Epigenetics, Promoter Regions, Genetic, Gene, ComputingMilieux_MISCELLANEOUS, Genetics (clinical), 030304 developmental biology, 0303 health sciences, Mutation, Research, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, [SDV.BBM.MN]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular Networks [q-bio.MN], Promoter, Glioma, DNA Methylation, Chromatin, Isocitrate Dehydrogenase, 3. Good health, Cell biology, Gene Expression Regulation, Neoplastic, [SDV.BBM.MN] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular Networks [q-bio.MN], CpG site, CpG-island, Cancer cell, DNA methylation, [SDV.BBM.GTP] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], CpG Islands, Female, 030217 neurology & neurosurgery, Bivalent chromatin
Abstract

In cancer cells, aberrant DNA methylation is commonly associated with transcriptional alterations, including silencing of tumor suppressor genes. However, multiple epigenetic mechanisms, including polycomb repressive marks, contribute to gene deregulation in cancer. To dissect the relative contribution of DNA methylation–dependent and –independent mechanisms to transcriptional alterations at CpG island/promoter-associated genes in cancer, we studied 70 samples of adult glioma, a widespread type of brain tumor, classified according to their isocitrate dehydrogenase (IDH1) mutation status. We found that most transcriptional alterations in tumor samples were DNA methylation–independent. Instead, altered histone H3 trimethylation at lysine 27 (H3K27me3) was the predominant molecular defect at deregulated genes. Our results also suggest that the presence of a bivalent chromatin signature at CpG island promoters in stem cells predisposes not only to hypermethylation, as widely documented, but more generally to all types of transcriptional alterations in transformed cells. In addition, the gene expression strength in healthy brain cells influences the choice between DNA methylation- and H3K27me3-associated silencing in glioma. Highly expressed genes were more likely to be repressed by H3K27me3 than by DNA methylation. Our findings support a model in which altered H3K27me3 dynamics, more specifically defects in the interplay between polycomb protein complexes and the brain-specific transcriptional machinery, is the main cause of transcriptional alteration in glioma cells. Our study provides the first comprehensive description of epigenetic changes in glioma and their relative contribution to transcriptional changes. It may be useful for the design of drugs targeting cancer-related epigenetic defects.

Published
2019
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2. Neural correlates of rehabilitation program with robot-assisted intensive therapy in one case of Holmes tremor

Author

Youssef El Ouadih, Anna Sontheimer, Catherine Sarret, Jean-Jacques Lemaire, Anne-Marie Briancon, Guilhem Millet, Bénédicte Pontier, Eric Pantera, Jerome Coste, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Centre de Médecine Physique de Réadaptation de Pionsat, Centre Hospitalier Etienne Clémentel, SAMSAH de LADAPT Auvergne, CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand, We have no financial support for this research, Service de Neurochirurgie [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand]

Subjects
030506 rehabilitation, Levodopa, Cerebellum, medicine.medical_specialty, Deep brain stimulation, medicine.medical_treatment, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, rehabilitation, Holmes tremor, 03 medical and health sciences, 0302 clinical medicine, Physical medicine and rehabilitation, medicine, Orthopedics and Sports Medicine, Stroke, Neural correlates of consciousness, Rehabilitation, business.industry, medicine.disease, diffusion tensor imaging, 3. Good health, medicine.anatomical_structure, functional MRI, Levetiracetam, 0305 other medical science, business, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, medicine.drug
Abstract

International audience; Holmes tremor (HT) is a rare movement disorder characterized by low-frequency tremor, inferior to 5 Hz, at rest and during postural and intentional conditions (1). It severely alters the functional abilities. The pathophysiology of tremor is unknown. However, dysfunctions of cortico-ponto-cerebello-thalamo-cortical loops were hypothesized by Bucy in 1944 and confirmed since notably in HT (2,3), involving contralateral sensorimotor and prefrontal cortices and the ipsilateral cerebellum. Treatments of HT include levodopa, dopamine agonists, anticholinergics, propranolol, primidone, levetiracetam, more recently botulinum toxin and deep brain stimulation, with variable and unpredictable responses (4). Hence we built a personalized rehabilitation program with intensive robotic rehabilitation, as proposed after stroke (5), associated to classical human-guided rehabilitation, in one case of HT. The lesions were scrutinized using structural magnetic resonance imaging (MRI). Both clinical effects and functional MRI (fMRI) activations were studied before and after rehabilitation, willing to explore underlying neural correlates.

Published
2021
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3. Atlas Optimization for Deep Brain Stimulation

Author

Vogel, Dorian, Wårdell, Karin, Coste, Jerome, Lemaire, Jean-Jacques, Hemm, Simone, Institute for Medical and Analytical Technologies, School of Life Sciences (IMAT), University of Applied Sciences and Arts Northwestern Switzerland (HES-SO), Department of Biomedical Engineering [Linköping], Linköping University (LIU), Institut Pascal (IP), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, This work was financially supported by the Swedish Foundation for Strategic Research (SSF BD15-0032), Swedish Research Council (VR 2016-03564), and the University of Applied Sciences and Arts Northwestern Switzerland (FHNW)., Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
Registration, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Patient normalization, Optimisation, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Atlas, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, Deep Brain Stimulation (DBS), Movement disorders, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; Electrical stimulation of the deep parts of the brain is the standard answer for patients subject to drug-refractory movement disorders. Collective analysis of data collected during surgeries are crucial in order to provide more systematic planning assistance and understanding the physiological mechanisms of action. To that end, the process of normalizing anatomies captured with Magnetic Resonance imaging across patients is a key component. In this work, we present the optimization of a workflow designed to create group-specific anatomical templates: a group template is refined iteratively using the results of successive non-linear image registrations with refinement steps in the in the basal-ganglia area. All non-linear registrations were executed using the Advanced Normalization Tools (ANTs) and the quality of the nor-malization was measured using spacial overlap of anatomical structures manually delineated during the planning of the surgery. The parameters of the workflow evaluated were: the use of multiple modalities sequentially or together during each registration to the template, the number of iterations in the template creation and the fine settings of the non-linear registration tool. Using the T1 and white matter attenuated inverse recovery modalities (WAIR) together produced the best results, especially in the center of the brain. The optimal numbers of iterations of the template creation were higher than those from the literature and our previous works. Finally, the setting of the non-linear registration tool that improved results the most was the activation of the registration with the native voxel sizes of images, as opposed to down-sampled version of the images. The normalization process was optimized over our previous study and allowed to obtain the best possible anatomical nor-malization of this specific group of patient. It will be used to summarize and analyze peri-operative measurements during test stimulation. The aim is that the conclusions obtained from this analysis will be useful for assistance during the planning of new surgeries.

Published
2021
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4. Challenging foreign body surgery: residual needlefish jaws

Author

Lemaire, Jean-Jacques, El Ouadih, Youssef, Pham Dang, Nathalie, Groza, Dmitrii, Thiombiano, Abdoulaye, Khalil, Toufic, Kemeny, Jean Louis, Lemaire, Jean Jacques, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-Hôpital Gabriel Montpied, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), CHU Clermont-Ferrand, CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
medicine.medical_specialty, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, 030230 surgery, Posterior approach, 03 medical and health sciences, 0302 clinical medicine, medicine, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Needlefish, 030223 otorhinolaryngology, ComputingMilieux_MISCELLANEOUS, biology, business.industry, [SCCO.NEUR]Cognitive science/Neuroscience, Chronic pain, General Medicine, medicine.disease, biology.organism_classification, Navigation, 3. Good health, Surgery, Foreign body, Neurology (clinical), Anterior approach, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; We report a case of a needlefish jaws retained near the C5-C6 joint that was associated with chronic pain and inflammation and seen confirmed by FDG-PET scan. Two unsuccessful surgeries using an anterior approach were complicated by vascular and nerve injuries. We used image-guided surgery with a posterior approach.

Published
2020
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5. Anatomical Brain Structures Normalization for Deep Brain Stimulation in Movement Disorders

Author

Jean-Jacques Lemaire, Dorian Vogel, Jerome Coste, Simone Hemm, Karin Wårdell, Ashesh Shah, Institute for Medical and Analytical Technologies, School of Life Sciences (IMAT), University of Applied Sciences and Arts Northwestern Switzerland (HES-SO), Department of Biomedical Engineering [Linköping], Linköping University (LIU), Institute for Medical and Analytical Technologies, School of Life Sciences (IMA), University of Applied Sciences and Arts Northwestern Switzerland (FHNW), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, This work was financially supported by the Swedish Foundation for Strategic Research (SSF BD15-0032), Swedish Research Council (VR2016-03564), and the University of Applied Science and Arts North-Western Switzerland (FHNW)., Swedish Foundation for Strategic Research, Swedish Research Council, University of Applied Sciences and Arts Northwestern Switzerland, CHU de Clermont-Ferrand, CHU Clermont-Ferrand - TGI-IP / MPS-ICCF / TechMed, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, and Coste, Jérôme

Subjects
Male, Movement disorders, [SDV.MHEP.CHI] Life Sciences [q-bio]/Human health and pathology/Surgery, Computer science, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, medicine.medical_treatment, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, lcsh:RC346-429, 0302 clinical medicine, Thalamus, atlas, Deep brain stimulation (DBS), Patient normalization, Template, Group analysis, Image registration, Atlas, Aged, 80 and over, Brain Mapping, Movement Disorders, 05 social sciences, Brain, Regular Article, Middle Aged, Magnetic Resonance Imaging, Electrodes, Implanted, deep brain stimulation, Neurology, group analysis, lcsh:R858-859.7, Female, medicine.symptom, Radiology, Nuclear Medicine and Medical Imaging, Normalization (statistics), [SDV.MHEP.AHA] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Deep brain stimulation, Cognitive Neuroscience, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Neuroimaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, lcsh:Computer applications to medicine. Medical informatics, 050105 experimental psychology, 03 medical and health sciences, Imaging, Three-Dimensional, patient normalization, medicine, [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Humans, 0501 psychology and cognitive sciences, Radiology, Nuclear Medicine and imaging, lcsh:Neurology. Diseases of the nervous system, Aged, Modality (human–computer interaction), business.industry, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, template, Pattern recognition, Pipeline (software), image registration, [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, Workflow, Neurology (clinical), Artificial intelligence, Radiologi och bildbehandling, business, 030217 neurology & neurosurgery
Abstract

Highlights: • Non-linear iterative structural normalization method focused on the deep brain. • Multi-modality image data from deep brain stimulation patients. • Comparison of ANTS, FNIRT and DRAMMS for the non-linear registrations using different settings for each. • Evaluation of the registration tools based on the analysis of 58 structures of the deep brain segmented manually by a single expert. • ANTS was identified as the best performing non-linear registration tool., Deep brain stimulation (DBS) therapy requires extensive patient-specific planning prior to implantation to achieve optimal clinical outcomes. Collective analysis of patient’s brain images is promising in order to provide more systematic planning assistance. In this paper the design of a normalization pipeline using a group specific multi-modality iterative template creation process is presented. The focus was to compare the performance of a selection of freely available registration tools and select the best combination. The workflow was applied on 19 DBS patients with T1 and WAIR modality images available. Non-linear registrations were computed with ANTS, FNIRT and DRAMMS, using several settings from the literature. Registration accuracy was measured using single-expert labels of thalamic and subthalamic structures and their agreement across the group. The best performance was provided by ANTS using the High Variance settings published elsewhere. Neither FNIRT nor DRAMMS reached the level of performance of ANTS. The resulting normalized definition of anatomical structures were used to propose an atlas of the diencephalon region defining 58 structures using data from 19 patients.

Published
2020
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6. Patterns of Failure After Linear Accelerator Radiosurgery for Cerebral Arteriovenous Malformations

Author

Julian Biau, Youssef El Ouadih, Bénédicte Vigier, Pierre Verrelle, Aurélien Mulliez, Toufic Khalil, Jean Gabrillargues, V. Dedieu, G. Dupic, J.-J. Lemaire, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Unité de Nutrition Humaine (UNH), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), CHU Clermont-Ferrand, Imagerie Moléculaire et Stratégies Théranostiques (IMoST), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Curie [Paris], Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
Adult, Intracranial Arteriovenous Malformations, Male, medicine.medical_specialty, Adolescent, medicine.medical_treatment, [SDV]Life Sciences [q-bio], Failure, [SDV.CAN]Life Sciences [q-bio]/Cancer, Radiosurgery, Treatment failure, Arteriovenous malformation, Radiosensitivity, 03 medical and health sciences, Young Adult, 0302 clinical medicine, Risk Factors, LINAC, parasitic diseases, medicine, Humans, In patient, Embolization, Treatment Failure, Patterns, Retrospective Studies, Patterns of failure, business.industry, Linear accelerator radiosurgery, Radioresistance, Middle Aged, medicine.disease, 3. Good health, Cerebral arteriovenous malformations, 030220 oncology & carcinogenesis, Surgery, Female, Neurology (clinical), Radiology, business, 030217 neurology & neurosurgery
Abstract

Background Numerous studies have assessed the predictive factors for the arteriovenous malformation (AVM) response to stereotactic radiosurgery (SRS). However, only a few have discussed the causes of failure. The aim of the present study was to evaluate the patterns of failure in patients with AVM who had undergone linear accelerator SRS. Methods We performed a retrospective analysis of 288 patients who had undergone linear accelerator SRS in our institution from 1995 to 2011. Failure was defined from the findings of the follow-up angiogram at 5 years, with failure identified in 44 patients. The distribution of causes was estimated using a descriptive analysis of literature-based causes, including a minimal margin dose of Results Incomplete nidus identification (41%) and previous embolization (77%) were the most frequently observed conditions in patients with failure. Patients who had undergone previous embolization, for whom the cause of failure had always been identified (P = 0.001), were younger (P = 0.004) and had had a larger nidus volume (P = 0.025). Recanalization was rare (5 of 34 patients) and had occurred exclusively in women (P = 0.048). Larger nidus volumes were less frequent (mean, 2.18 ± 2.2 cm3; range, 0.13–10.8 cm3) and had been observed mainly in women when >2 cm3 (P = 0.012). An insufficient dose was observed in 9 patients and had occurred in the case of a larger volume (P = 0.031), which had resulted in dosimetry constraints in 3 patients and treatment in the vicinity of eloquent zones in 6 patients. No known cause was found in 5 patients, 4 of whom had had a low Spetzler-Martin grade (I and II; P = 0.003), suggestive of radioresistance. Conclusion The results of our detailed analysis have highlighted the distribution of the causes of failure and the potential role of radioresistance in treatment failure.

Published
2020
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7. Anatomical predictors of cognitive decline after subthalamic stimulation in Parkinson’s disease

Author

Bérangère Debilly, Bruno Pereira, Vincent Planche, Dominique Morand, Tiphaine Vidal, Emmanuel de Schlichting, Ingrid de Chazeron, Franck Durif, Pierre-Michel Llorca, Jean-Jacques Lemaire, Fanny Munsch, Philippe Derost, Jerome Coste, Ana Marques, Université de Bordeaux (UB), service de Biostatistiques, DRCI, CHU Clermont-Ferrand, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Centre Mémoire de Ressources et de Recherche [CHU Clermont-Ferrand] (CMRR), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Délégation à la Recherche Clinique et à l'Innovation, Neuro-Psycho Pharmacologie des Systèmes Dopimanégiques sous-corticaux (NPsy-Sydo), CHU Clermont-Ferrand-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Groupe de sociologie politique et morale (GSPM), École des hautes études en sciences sociales (EHESS)-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], Université de Bordeaux ( UB ), Centre Hospitalier Universitaire de Clermont-Ferrand, CHU Clermont-Ferrand-Hôpital Gabriel Montpied, Environnement et Grandes Cultures ( EGC ), AgroParisTech-Institut National de la Recherche Agronomique ( INRA ), Institut Pascal - Clermont Auvergne ( IP ), Sigma CLERMONT ( Sigma CLERMONT ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Neuro-Psycho Pharmacologie des Systèmes Dopimanégiques sous-corticaux - Clermont Auvergne ( NPsy-Sydo ), CHU Clermont-Ferrand-Université Clermont Auvergne ( UCA ), Equipe de Recherche en Signal et Imagerie Medicale ( ERIM-ERI 14 ), Université d'Auvergne - Clermont-Ferrand I ( UdA ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Groupe de sociologie politique et morale ( GSPM ), École des hautes études en sciences sociales ( EHESS ) -Centre National de la Recherche Scientifique ( CNRS ), and Centre Mémoire de Ressources et de Recherche [CHU de Clermont-Ferrand]

Subjects
Male, 0301 basic medicine, Parkinson's disease, Neurology, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Deep Brain Stimulation, medicine.medical_treatment, Neuropsychological Tests, Subthalamic nucleus, Nucleus Accumbens, Cohort Studies, [ SDV.NEU.SC ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences, Cognition, 0302 clinical medicine, Cognitive decline, ComputingMilieux_MISCELLANEOUS, [SDV.NEU.PC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Psychology and behavior, General Neuroscience, [SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences, Parkinson Disease, Middle Aged, Magnetic Resonance Imaging, Treatment Outcome, [ SDV.NEU.NB ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [ SCCO.NEUR ] Cognitive science/Neuroscience, Cardiology, Female, Anatomy, medicine.symptom, MRI, medicine.medical_specialty, Histology, Deep brain stimulation, Perseveration, Prefrontal Cortex, Nucleus accumbens, [ SDV.NEU.PC ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Psychology and behavior, 03 medical and health sciences, Atrophy, Internal medicine, medicine, Humans, Cognitive Dysfunction, Aged, business.industry, [SCCO.NEUR]Cognitive science/Neuroscience, Deep-brain stimulation, medicine.disease, 030104 developmental biology, Subthalamus, Parkinson’s disease, business, 030217 neurology & neurosurgery, Follow-Up Studies
Abstract

International audience; We investigated whether pre-operative MRI measures of focal brain atrophy could predict cognitive decline occurring after deep brain stimulation (DBS) of the subthalamic nucleus (STN) in patients with Parkinson's disease (PD). For that purpose, we prospectively collected data of 42 consecutive patients with PD who underwent bilateral STN-DBS. Normalized brain structure volumes and cortical thicknesses were measured on pre-operative T1-weighted MRI. Patients were tested for their cognitive performances before surgery and 1 year after. After controlling for age, gender, pre-operative disease severity, change in dopaminomimetic dose after surgery and contact location, we found correlations: (1) between the variation of the total Mattis dementia rating scale (MDRS) score and left lateral ventricle volume (p = 0.032), (2) between the variation of the initiation/perseveration subscore of the MDRS and the left nucleus accumbens volume (p = 0.042) and the left lateral ventricle volume (p = 0.017) and (3) between the variation of the backward digit-span task and the right and left superior frontal gyrus thickness (p = 0.004 and p = 0.007, respectively). Left nucleus accumbens atrophy was associated with decline in the initiation/perseveration subscore with the largest effect size (d = − 1.64). Pre-operative left nucleus accumbens volume strongly predicted postoperative decline in the initiation/attention subscore (AUC = 0.92, p < 0.001, 96.3% sensitivity, 80.0% specificity, 92.9% PPV and 92.9% NPV). We conclude that the morphometric measures of brain atrophy usually associated with cognitive impairment in PD can also explain or predict a part of cognitive decline after bilateral STN-DBS. In particular, the left accumbens nucleus volume could be considered as a promising marker for guiding surgical decisions.

Published
2018
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8. A rare complication of flow diverter: delayed migration causing aneurysm expansion and brainstem compression

Author

Aurélien Coste, Rémi Chaix, Laurent Sakka, Guillaume Coll, Betty Jean, Jean-Jacques Lemaire, Youssef El Ouadih, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
medicine.medical_specialty, medicine.medical_treatment, Brainstem compression, complication, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, Therapeutic Devices, 03 medical and health sciences, 0302 clinical medicine, Aneurysm, medicine.artery, medicine, aneurysm expansion, Embolization, delayed migration, Flow diverter, business.industry, General Medicine, medicine.disease, 3. Good health, Surgery, brainstem compression, Posterior inferior cerebellar artery, 030220 oncology & carcinogenesis, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Neurology (clinical), Brainstem, business, Complication, 030217 neurology & neurosurgery
Abstract

International audience; Flow-diverting stents (FD) are admitted therapeutic devices for challenging aneurysms. Delayed migrations of FD remain exceptional, particularly with brainstem compression. We report a case of delayed migration of pipeline embolization device (PED) responsible of medulla oblongata compression due to expansion of posterior inferior cerebellar artery (PICA) aneurysm. This is the first report of brainstem compression due to delayed migration of FD. Among the seven previously reported cases of FD delayed migration, two led to death. Our case illustrates the importance of technical issues of stenting and the role of surgery facing the clinical emergency of vascular compression of lower brainstem. We wanted to warn neurosurgeons of this rare and delayed complication, which likely could become less exceptional with the increase of indications and utilizations of FD

Published
2020
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9. Stimulation maps: visualization of results of quantitative intraoperative testing for deep brain stimulation surgery

Author

Jean-Jacques Lemaire, Jerome Coste, Simone Hemm, Karin Wårdell, Erik Schkommodau, Ashesh Shah, Fabiola Alonso, Daniela Pison, Dorian Vogel, Institute for Medical and Analytical Technologies, School of Life Sciences (IMAT), University of Applied Sciences and Arts Northwestern Switzerland (HES-SO), Department of Biomedical Engineering (IMT), Linköping University (LIU), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, This research was jointly funded by the Swiss National Science Foundation (CR3212_153370), the Germaine de Staël program of the Swiss Academy of Engineering Sciences, the French Ministry of Health (2011-A00774-37), the Swedish Research Council (2016-03564) and Swedish Foundation for Strategic Research (BD15-0032).Open access funding provided by Linköping University., Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
medicine.medical_specialty, Deep brain stimulation, Movement disorders, medicine.medical_treatment, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Biomedical Engineering, Stimulation, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, computer.software_genre, Electric field simulations, Accelerometry, Data visualization, Essential tremor, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Physical medicine and rehabilitation, Voxel, Monitoring, Intraoperative, Tremor, Image Processing, Computer-Assisted, medicine, Humans, Precision Medicine, business.industry, Brain, medicine.disease, University hospital, 3. Good health, Computer Science Applications, Visualization, Surgery, Computer-Assisted, Other Medical Engineering, Original Article, [SDV.IB]Life Sciences [q-bio]/Bioengineering, medicine.symptom, Annan medicinteknik, business, Microelectrodes, computer, 030217 neurology & neurosurgery, Deep brain stimulation surgery
Abstract

Deep brain stimulation (DBS) is an established therapy for movement disorders such as essential tremor (ET). Positioning of the DBS lead in the patients brain is crucial for effective treatment. Extensive evaluations of improvement and adverse effects of stimulation at different positions for various current amplitudes are performed intraoperatively. However, to choose the optimal position of the lead, the information has to be "mentally" visualized and analyzed. This paper introduces a new technique called "stimulation maps," which summarizes and visualizes the high amount of relevant data with the aim to assist in identifying the optimal DBS lead position. It combines three methods: outlines of the relevant anatomical structures, quantitative symptom evaluation, and patient-specific electric field simulations. Through this combination, each voxel in the stimulation region is assigned one value of symptom improvement, resulting in the division of stimulation region into areas with different improvement levels. This technique was applied retrospectively to five ET patients in the University Hospital in Clermont-Ferrand, France. Apart from identifying the optimal implant position, the resultant nine maps show that the highest improvement region is frequently in the posterior subthalamic area. The results demonstrate the utility of the stimulation maps in identifying the optimal implant position. Graphical abstract Funding Agencies|Swiss National Science FoundationSwiss National Science Foundation (SNSF) [CR3212_153370]; Germaine de Stael program of the Swiss Academy of Engineering Sciences; French Ministry of Health [2011-A00774-37]; Swedish Research CouncilSwedish Research Council [2016-03564]; Swedish Foundation for Strategic ResearchSwedish Foundation for Strategic Research [BD15-0032]

Published
2020
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10. Glioblastomas extension on DTI: prospective and comparative study versus metastases and healthy subjects

Author

Youssef El Ouadih, Céline Botella, Jérôme Coste, Bruno Pereira, Anna Sontheimer, Béatrice Claise, Jean-Jacques Lemaire, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Unité de biostatistiques, Unité de neuroradiologie, service de radiologie, CHU de Clermont-FerrandUniversité Clermont Auvergne, CHU Clermont-Ferrand - TGI-IP / MPS-ICCF / TechMed, EL OUADIH, YOUSSEF, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
[SDV.MHEP.AHA] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], [SDV.MHEP.CHI] Life Sciences [q-bio]/Human health and pathology/Surgery, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Metastasis behaviour, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, behavioral disciplines and activities, MRI Imaging, [SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, Metastasis behavior, MRI mapping, nervous system, DTI, [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Glioblastoma
Abstract

Rationale Occult tumor cell invasion along white matter fibers is inapparent in conventional MRI. We aimed to precise glioblastomas extension on Diffusion Tensor Imaging (DTI) through a prospective and comparative study. Patients, material and methods Glioblastomas (n=15), metastases (n=9) and healthy controls (n=15) were included. DTI parameters were analyzed, particularly in the normal appearing white matter (NAWM) beyond peritumoral area. Results Specific DTI abnormalities were found in glioblastomas such as hyperanisotropia and morphological modifications in the NAWM.

Published
2019

11. MRI Atlas of the Human Deep Brain

Author

Jean-Jacques Lemaire, Antonio De Salles, Guillaume Coll, Youssef El Ouadih, Rémi Chaix, Jérôme Coste, Franck Durif, Nikos Makris, Ron Kikinis, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Hospital for the Heart (InCor), Neuro-Psycho Pharmacologie des Systèmes Dopimanégiques sous-corticaux (NPsy-Sydo), CHU Clermont-Ferrand-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurologie [CHU Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand, Harvard Medical School [Boston] (HMS), University of Bremen, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU de Clermont-FerrandUniversité Clermont Auvergne, CHU Clermont-Ferrand - TGI-IP / MPS-ICCF / TechMed, and Publica

Subjects
Mri imaging, Computer science, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, Functional neurosurgery, lcsh:RC346-429, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Atlas (anatomy), thalamus, medicine, [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], atlas, human, hypothalamus, lcsh:Neurology. Diseases of the nervous system, medicine.diagnostic_test, Stereotaxis, Magnetic resonance imaging, Brief Research Report, subthalamus, Sagittal plane, MRI Imaging, MRI - Magnetic resonance imaging, medicine.anatomical_structure, Neurology, Coronal plane, Neurology (clinical), deep brain, stereotaxis, Neuroscience, 030217 neurology & neurosurgery, MRI
Abstract

International audience; Mastering detailed anatomy of the human deep brain in clinical neurosciences is challenging. Although numerous pioneering works have gathered a large dataset of structural and topographic information, it is still difficult to transfer this knowledge into practice, even with advanced magnetic resonance imaging techniques. Thus, classical histological atlases continue to be used to identify structures for stereotactic targeting in functional neurosurgery. Physicians mainly use these atlases as a template co-registered with the patient's brain. However, it is possible to directly identify stereotactic targets on MRI scans, enabling personalized targeting. In order to help clinicians directly identify deep brain structures relevant to present and future medical applications, we built a volumetric MRI atlas of the deep brain (MDBA) on a large scale (infra millimetric). Twelve hypothalamic, 39 subthalamic, 36 telencephalic, and 32 thalamic structures were identified, contoured, and labeled. Nineteen coronal, 18 axial, and 15 sagittal MRI plates were created. Although primarily designed for direct labeling, the anatomic space was also subdivided in twelfths of AC-PC distance, leading to proportional scaling in the coronal, axial, and sagittal planes. This extensive work is now available to clinicians and neuroscientists, offering another representation of the human deep brain ([https:// hal.archives-ouvertes.fr/] [hal-02116633]). The atlas may also be used by computer scientists who are interested in deciphering the topography of this complex region.

Published
2019
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12. Hydrocephalus and Chiari malformation pathophysiology in FGFR2-related faciocraniosynostosis: A review

Author

Vincent Jecko, Guillaume Coll, F. Di Rocco, F. Abed Rabbo, Y. El Ouadih, Laurent Sakka, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'anatomie, Université de Lille, Droit et Santé-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
musculoskeletal diseases, Cerebellum, congenital, hereditary, and neonatal diseases and abnormalities, Synchondrosis, Chiari, 03 medical and health sciences, Complex craniosynostosis, Craniosynostoses, 0302 clinical medicine, Cerebrospinal fluid, medicine, Humans, Receptor, Fibroblast Growth Factor, Type 2, Chiari malformation, Pfeiffer, business.industry, Anatomy, Acrocephalosyndactylia, medicine.disease, Pathophysiology, 3. Good health, Hydrocephalus, Arnold-Chiari Malformation, Stenosis, medicine.anatomical_structure, Crouzon, 030220 oncology & carcinogenesis, Cerebellar tonsil, Surgery, Apert, Neurology (clinical), business, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

International audience; Background: Patients with syndromic faciocraniosynostosis due to the mutation of the fibroblast growth factor receptor (FGFR) 2 gene present premature fusion of the coronal sutures and of the cranial base synchondrosis. Cerebrospinal fluid (CSF) circulation disorders and cerebellar tonsil prolapse are frequent findings in faciocraniosynostosis. Objective: We reviewed the medical literature on the pathophysiological mechanisms of CSF disorders such as hydrocephalus and of cerebellar tonsil prolapse in FGFR2-related faciocraniosynostosis. Discussion: Different pathophysiological theories have been proposed, but none elucidated all the symptoms present in Apert, Crouzon and Pfeiffer syndromes. The first theory that addressed CSF circulation disruption was the constrictive theory (cephalocranial disproportion): cerebellum and brain stem are constricted by the small volume of the posterior fossa. The second theory proposed venous hyperpressure due to jugular foramens stenosis. The most recent theory proposed a pressure differential between CSF in the posterior fossa and in the vertebral canal, due to foramen magnum stenosis.

Published
2019
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13. MRI Atlas of the Human Deep Brain

Author

Lemaire, Jean-Jacques, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, and Lemaire, Jean-Jacques

Subjects
[SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.MHEP.CHI] Life Sciences [q-bio]/Human health and pathology/Surgery, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SCCO.NEUR] Cognitive science/Neuroscience, education, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

MRI Atlas of the Human Deep Brain

Published
2019

14. Clinical MRI mapping of the deep brain

Author

Lemaire, Jean-Jacques, Lemaire, Jean-Jacques, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
[SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.MHEP.CHI] Life Sciences [q-bio]/Human health and pathology/Surgery, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SCCO.NEUR] Cognitive science/Neuroscience, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience

Published
2019

15. Visual Hallucinations with Disembodiment and Self-Motion Illusion on Eye Closure after Brain Cyst Drainage: A Case Report

Author

Anna Sontheimer, Guillaume Coll, FranÃÂçois Vassal, Sophie Mathais, Jean-Jacques Lemaire, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
medicine.medical_specialty, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, media_common.quotation_subject, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Illusion, Precuneus, Splenium, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, Audiology, Corpus callosum, Centrum semiovale, medicine, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Cingulum (brain), Cyst, ComputingMilieux_MISCELLANEOUS, media_common, business.industry, [SCCO.NEUR]Cognitive science/Neuroscience, medicine.disease, Psychiatry and Mental health, medicine.anatomical_structure, Posterior cingulate, Neurology (clinical), business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

Background We report the first documented case of visual hallucinations with disembodiment and selfmotion illusion on eye closure. Clinical presentation A 71-year-old woman was operated on for a cyst of the left centrum semiovale, adjacent to the precuneus, the posterior cingulate cortex and the splenium of corpus callosum. Two days after, she complained of visual hallucinations occurring on eye closure. She reported reminiscences of landscapes, trees and animals. She had a sensation of floating and moving, flying over the landscapes or walking on lanes. She could stop the hallucinations by opening her eyes. The hallucinations lasted for six days. Pharmacological and neurological possible origins of the hallucinations were explored. Conclusion No direct relation could be found between the pharmacological treatment and the hallucinations. Cerebral volumetric analysis showed a structural reorganization following cyst drainage, which might have conducted to transient hyper excitability of the surrounding structures. The release phenomenon induced by eye closure might have triggered the activation of a distributed network within associative visual, parietal and temporal cortices. The involvement of the splenium and the cingulum is discussed. Furthermore, MRI- and DTI-follow-up suggests that structural reorganization after surgery can be spread over long periods until disappearance of cyst-related deformations. Stabilization of cyst volume, near to zero, was observed after about 2 years.

Published
2019
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16. A randomized controlled study assessing outcome, cognition, autonomy and quality of life in over 70-year-old patients after aneurysmal subarachnoid hemorrhage

Author

Proust, F., Bracard, S., Lejeune, J.-P., Thines, L., Leclerc, X., Penchet, G., Bergé, J., Morandi, X., Gauvrit, Jean-Yves, Mourier, K., Ricolfi, Frédéric, Lonjon, M., Sedat, J., Bataille, B., Droineau, J., Civit, T., Magro, E., Pelissou-Guyotat, I., Cebula, H., Lallouche, K., David, P., Emery, E., Courtheoux, P., Vignes, J.-R., Bénichou, J., Aghakani, N., Roche, P.-H., Gay, E., Bessou, P., Guabrillargues, J., Irthum, B., Investigators, Fashe, Service de neurochirurgie [CHU Rouen], CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Service de Neurochirurgie [HUS, Strasbourg], Les Hôpitaux Universitaires de Strasbourg (HUS), Service de Neurochirurgie [CHRU Nancy], Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Département de Neurochirurgie[Lille], Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Service de Neurochirurgie [CHRU Besançon], Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon), Service de Neurochirurgie A [Bordeaux], CHU Bordeaux [Bordeaux], Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de neurochirurgie [Rennes] = Neurosurgery [Rennes], CHU Pontchaillou [Rennes], Service de neurochirurgie [CHU Dijon], Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Cognition, Action, et Plasticité Sensorimotrice [Dijon - U1093] (CAPS), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM), Département de Neurochirurgie [Hôpital Pasteur de Nice], Hôpital Pasteur [Nice] (CHU), Service de Neurochirurgie [CHU Poitiers], Centre hospitalier universitaire de Poitiers (CHU Poitiers), Service de neurochirurgie [Brest], Hôpital de la Cavale Blanche - CHRU Brest (CHU - BREST ), Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL), Service de neurochirurgie [Bicêtre], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Bicêtre, Service de Neurochirurgie [CHU Caen], Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Tumorothèque de Caen Basse-Normandie (TCBN), Unité de biostatistiques [CHU Rouen], Service de Neurochirurgie Fonctionnelle, Centre douleur chronique, APHM, Timone, 13385, Marseille, France, Centre Hospitalier Universitaire [Grenoble] (CHU), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Université de Lille, Droit et Santé-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Service de Neurochirurgie [CHRU de Besançon], Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de neurochirurgie [CHU de Dijon], Service de Neurochirurgie [Poitiers], Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-CHU Rouen, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
Male, Aging, Pediatrics, medicine.medical_specialty, Activities of daily living, Subarachnoid hemorrhage, medicine.medical_treatment, Population, 030218 nuclear medicine & medical imaging, law.invention, 03 medical and health sciences, Cognition, 0302 clinical medicine, Elderly, Randomized controlled trial, Quality of life, law, Modified Rankin Scale, Randomized controlled study, Activities of Daily Living, Humans, Medicine, education, Aged, Aged, 80 and over, education.field_of_study, Endovascular coiling, business.industry, Incidence (epidemiology), medicine.disease, Intracranial aneurysm, 3. Good health, Treatment Outcome, Research Design, Quality of Life, Female, Surgery, Neurology (clinical), [INFO.INFO-BI]Computer Science [cs]/Bioinformatics [q-bio.QM], business, 030217 neurology & neurosurgery
Abstract

Background Current aging of the population with good physiological status and the increasing incidence of subarachnoid hemorrhage (SAH) in elderly patients has enhanced the benefit of treatment in terms of independence and long-term quality of life (QoL). Methods From November 1, 2008 to October 30, 2012, 351 patients aged 70 years or older with aneurysmal SAH underwent adapted treatment: endovascular coiling (EV) for 228 (65%) patients, microsurgical clipping (MS) for 75 (29.3%) or conservative treatment for 48 (13.7%). Forty-one of these were randomized to EV (n = 20) or to MS (n = 21). The objectives were to determine the proportion of patients with modified Rankin Scale score ≤ 2 (independence) at 1 year, and, secondarily, to compare cognitive function on the Mini-Mental State Examination (MMSE), autonomy on the Activities of Daily Living Index (ADLI) and Instrumental Activities of Daily Living scale (IADL), and QoL, in the prospective and randomized arms, at 1 year. Results At 1 year, with 1 loss to follow-up in the EV arm, 11 patients (55%) were independent after EV occlusion and 8 (38.1%) after MS exclusion, without significant difference (P = 0.29). Mortality was higher after MS during the first 2 postoperative months, and thereafter the difference between MS and EV ceased to be significant. Cognitive function and autonomy scores were similar in both arms. Conclusion In elderly patients treated for aneurysmal SAH, approximately 50% were independent at 1 year, with conserved cognition and autonomy. EV and MS are valid procedures in this population, with similar results at 1 year in terms of independence, cognition, autonomy, and QoL.

Published
2018
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17. Analysis of adverse effects of stimulation during DBS surgery by patient-specific FEM simulations

Author

Jerome Coste, Jean-Jacques Lemaire, Dorian Vogel, Ashesh Shah, Fabiola Alonso, Karin Wårdell, Daniela Pison, Simone Hemm, Institute for Medical and Analytical Technologies, School of Life Sciences (IMAT), University of Applied Sciences and Arts Northwestern Switzerland (HES-SO), Department of Biomedical Engineering (IMT), Linköping University (LIU), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), financial support of this research by the Swiss National Science Foundation (CR3212_153370), Germaine de Staël program of the Swiss Academy of Engineering Sciences, French Ministry of Health (2011A00774-37), Swedish Research Council (2016-03564) and Swedish Foundation for Strategic Research (BD15-0032), Engineering in Medicine and Biology Society (IEEE-EMBS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
medicine.medical_specialty, Deep brain stimulation, Movement disorders, medicine.medical_treatment, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Deep Brain Stimulation, 0206 medical engineering, Stimulation, 02 engineering and technology, 03 medical and health sciences, Dysarthria, 0302 clinical medicine, medicine, Humans, Adverse effect, Fem simulations, Movement Disorders, business.industry, Therapeutic effect, Patient specific, 020601 biomedical engineering, Surgery, [SDV.IB]Life Sciences [q-bio]/Bioengineering, medicine.symptom, business, 030217 neurology & neurosurgery
Abstract

International audience; Deep brain stimulation (DBS) represents today a well-established treatment for movement disorders. Nevertheless the exact mechanism of action of DBS remains incompletely known. During surgery, numerous stimulation tests are frequently performed in order to evaluate therapeutic and adverse effects before choosing the optimal implantation site for the DBS lead. Anatomical structures responsible for the induced adverse effects have been investigated previously, but only based on stimulation data obtained with the implanted DBS lead. The present study introduces a methodology to identify these anatomical structures during intraoperative stimulation tests based on patient-specific electric field simulations and visualization on the patient specific anatomy. The application to 4 patients undergoing DBS surgery and presenting dysarthria, paresthesia or pyramidal effects shows the different anatomical structures, which might be responsible for the adverse effects. Several of the identified structures have been previously described in the literature. To draw any statistically significant conclusions, the methodology has to be applied to further patients. Together with the visualization of the therapeutic effects, this new approach could assist the neurosurgeons in the future in choosing the optimal implant position.

Published
2018
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18. Application des technologies innovantes dans les états de conscience altérée : IRM fonctionnelle, traitement du langage et charge émotionnelle

Author

Anna Sontheimer, Bénédicte Pontier, Betty Jean, Jérôme Coste, Jean-Jacques Lemaire, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Association nationale des professionnels au service des traumatisés crâniens, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

19. Comportements conscients après stimulation cérébrale profonde chez cinq patients souffrant de troubles de la conscience sévères

Author

Jean-Jacques Lemaire, Anna Sontheimer, Bruno Pereira, Jérôme Coste, Sarah, D. Rosenberg, Sarret, C., Guillaume Coll, Jean Gabrillargues, Betty Jean, Thierry Gillart, Aurélien Coste, Basile Roche, Antony Kelly, Bénédicte Pontier, Fabien Feschet, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Unité de Biostatistiques [CHU Clermont-Ferrand], Direction de la recherche clinique et de l’innovation [CHU Clermont-Ferrand] (DRCI), Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), CHU Clermont-Ferrand, Service d'Anésthésie Réanimation [CHU Clermont-Ferrand], CHU Estaing [Clermont-Ferrand], Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand]

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

20. Co-registering Thalamus for Analysis of Patient-specific Intra-operative Improvement Maps in DBS

Author

Dorian Vogel, Ashesh Shah, Fabiola Alonso, Jean-Jacques Lemaire, Jérôme Coste, Karin Wårdell, Simone Hemm, Institute for Medical and Analytical Technologies, School of Life Sciences (IMAT), University of Applied Sciences and Arts Northwestern Switzerland (HES-SO), Department of Biomedical Engineering (IMT), Linköping University (LIU), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), This research was financially supported by the Swiss National Science Foundation, the University of Applied Sciences and Arts Northwestern Switzerland, the French Ministry of Health, the Swedish Research Council and the Parkinson Foundation at Linköping University, CHU de Clermont-Ferrand, France., European Society for Stereotactic and Functional Neurosurgery (ESSFN), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
nervous system, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.IB]Life Sciences [q-bio]/Bioengineering
Abstract

International audience; Deep brain stimulation (DBS) is used for symptomatic treatment of movement disorders. In many centers, the optimal DBS position is identified by intra-operative stimulation tests, which are performed at several positions along the planned trajectories toward the target structure with various stimulation amplitudes. The aim of the study was to propose a methodology summarizing all available intra-operative data of different patients to an atlas to provide targeting guidelines in the thalamus.

Published
2018

21. Connectivité cérébrale: Intérêt de l’interface cerveau machine

Author

Lemaire, Jean-Jacques, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

22. Deep brain stimulation in five patients with severe disorders of consciousness

Author

Jerome Coste, Anna Sontheimer, Bénédicte Pontier, Aurélien Coste, Betty Jean, Basile Roche, Jean Gabrillargues, Fabien Feschet, Antony Kelly, Bruno Pereira, Sarah Rosenberg, Jean-Jacques Lemaire, Guillaume Coll, Catherine Sarret, Thierry Gillart, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Service de Pédiatrie Générale [CHU Clermont-Ferrand], CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Service de radiologie, Service d'Anésthésie Réanimation [CHU Clermont-Ferrand], Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER, This study was funded by the Fondation de l’Avenir (Paris, France, ET1-615 2011, 'Deroche Legacy' Grant BO4-001, wages of AS, patient transportation and MRI costs) and the University Hospital of Clermont-Ferrand (waived hospital inpatient expenses, endorsed study insur-ance, trial promoter). Medtronic France supplied DBS devices (without charge), and the Centre Jean Perrin provided FDG Pet-Scan exams (without charge)., Service de Neurochirurgie [CHU Clermont-Ferrand], and CHU Gabriel Montpied [Clermont-Ferrand]

Subjects
0301 basic medicine, medicine.medical_specialty, Deep brain stimulation, Traumatic brain injury, Medial cortex, medicine.medical_treatment, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, Audiology, 03 medical and health sciences, 0302 clinical medicine, medicine, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Default mode network, Research Articles, Persistent vegetative state, Coma, business.industry, General Neuroscience, Minimally conscious state, medicine.disease, 030104 developmental biology, Wakefulness, Neurology (clinical), medicine.symptom, business, 030217 neurology & neurosurgery, Research Article
Abstract

International audience; Objective: The efficacy of deep brain stimulation in disorders of consciousness remains inconclusive. We investigated bilateral 30‐Hz low‐frequency stimulation designed to overdrive neuronal activity by dual pallido‐thalamic targeting, using the Coma Recovery Scale Revised (CRS‐R) to assess conscious behavior.Methods: We conducted a prospective, single center, observational 11‐month pilot study comprising four phases: baseline (2 months); surgery and titration (1 month); blind, random, crossover, 1.5‐month ON and OFF periods; and unblinded, 5‐month stimulation ON. Five adult patients were included: one unresponsive‐wakefulness‐syndrome male (traumatic brain injury); and four patients in a minimally conscious state, one male (traumatic brain injury) and three females (two hemorrhagic strokes and one traumatic brain injury). Primary outcome measures focused on CRS‐R scores. Secondary outcome measures focused notably on baseline brain metabolism and variation in activity (stimulation ON – baseline) using normalized fluorodeoxyglucose positron emission tomography maps. Statistical analysis used random‐effect models.Results: The two male patients (one minimally conscious and one unresponsive wakefulness syndrome) showed improved mean CRS‐R scores (stimulation ON vs. baseline), in auditory, visual and oromotor/verbal subscores, and visual subscores respectively. The metabolism of the medial cortices (low at baseline in all five patients) increased specifically in the two responders.Interpretation: Our findings show there were robust but limited individual clinical benefits, mainly in visual and auditory processes. Overall modifications seem linked to the modulation of thalamo‐cortico‐basal and tegmental loops activating default mode network cortices. Specifically, in the two responders there was an increase in medial cortex activity related to internal awareness.

Published
2018
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23. Second course of stereotactic radiosurgery for locally recurrent brain metastases: Safety and efficacy

Author

Toufic Khalil, Jean-Jacques Lemaire, F. Magnier, Michel Lapeyre, Pierre Verrelle, Julian Biau, V. Dedieu, J. Moreau, G. Dupic, Emmanuel Chautard, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Imagerie Moléculaire et Stratégies Théranostiques (IMoST), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de physique médicale, Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER-UNICANCER, Université d'Auvergne - Clermont-Ferrand I (UdA), Institut Curie [Paris], Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
Melanomas, Male, Multivariate analysis, medicine.medical_treatment, Cancer Treatment, Planning target volume, lcsh:Medicine, Toxicology, Pathology and Laboratory Medicine, Mathematical and Statistical Techniques, 0302 clinical medicine, Medicine and Health Sciences, Edema, Medicine, lcsh:Science, Neurological Tumors, ComputingMilieux_MISCELLANEOUS, Aged, 80 and over, Brain Diseases, Multidisciplinary, Brain Neoplasms, Middle Aged, 3. Good health, Treatment Outcome, Oncology, Neurology, 030220 oncology & carcinogenesis, Physical Sciences, Cohort, Female, Radiology, Anatomy, Statistics (Mathematics), Research Article, Adult, medicine.medical_specialty, Histology, [SDV.CAN]Life Sciences [q-bio]/Cancer, Research and Analysis Methods, Radiosurgery, Re-Irradiation, 03 medical and health sciences, Signs and Symptoms, Diagnostic Medicine, Humans, Statistical Methods, Survival analysis, Aged, Salvage Therapy, Toxicity, business.industry, Radiotherapy Planning, Computer-Assisted, lcsh:R, Cancers and Neoplasms, Biology and Life Sciences, Local failure, medicine.disease, Survival Analysis, Radiation therapy, Multivariate Analysis, Brain Metastasis, lcsh:Q, Cranial Irradiation, Neoplasm Recurrence, Local, business, Mathematics, 030217 neurology & neurosurgery, Follow-Up Studies, Brain metastasis
Abstract

In the present study, we have evaluated the efficacy and toxicity of repeated brain metastases (BM) stereotactic radiosurgery (SRS2) following local failure of a prior radiosurgical procedure (SRS1). Between December 1996 and August 2015, 30 patients with 36 BM underwent SRS2 with a median dose of 18Gy. All BM were located outside critical structures. Following SRS2, local control at 6 months and one year were respectively 82.9% (IC 95%: 67.6-91.9) and 67.8% (IC 95%: 51-81). On multivariate analysis, planning target volume (PTV) < 3cc (HR: 0.19 (0.1-0.52)) and whole brain radiotherapy (WBRT) prior to SRS2 (HR: 0.25 (0.1-0.64)) were significantly associated with a better local control. One- and two-year overall survival rates after SRS2 were respectively 65.5% (IC 95%: 47.3-80%) and 27.6% (IC 95%: 14.7-45.7). Median overall survival following SRS2 was 14.2 months (range 1-106). Nineteen (63%) patients died from progressive systemic disease. Three (10%) patients died from out-field progressive brain disease and 8 (27%) in-field. Concerning toxicities, edema, radionecrosis, and hemorrhages were identified in 5 (12.8%), 4 (10.2%), and 5 (12.8%) patients respectively. No toxicity resulted in a neurological deficit. On univariate analysis, toxicities were significantly associated with PTV > 7cc (p = 0.02) and all patients had a WBRT before SRS2. A second course of SRS for locally recurrent brain metastases showed encouraging rates of local control. This treatment led to acceptable toxicities, especially for brain metastases smaller than 7cc, in our selected cohort of patients with BM located outside critical structures. Further studies are needed.

Published
2018
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24. Subacute Medulla Oblongata Compression due to PICA Aneurysm Expansion Secondary to Delayed Migration of Flow Diverting Stent

Author

El Ouadhi, Youssef, Chaix, Rémi, Coste, Aurélien, CHABERT, Emmanuel, coll, guillaume, Sakka, Laurent, Lemaire, Jean-Jacques, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

25. Stimulation Cérébrale Profonde et états de conscience altérée

Author

Lemaire, Jean-Jacques, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Lemaire, Jean-Jacques, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
[SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging, [SDV.MHEP.CHI] Life Sciences [q-bio]/Human health and pathology/Surgery, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SCCO.NEUR] Cognitive science/Neuroscience, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience

Published
2018

26. Cartographie et connectomique du cerveau humain : pourquoi, comment et applications

Author

Lemaire, Jean-Jacques, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

27. Inter-individual variations and hemispheric asymmetries in structural connectivity patterns of the inferior fronto-occipital fascicle: a diffusion tensor imaging tractography study

Author

Anna Sontheimer, Benjamin Pommier, François Vassal, Jean-Jacques Lemaire, Service de Neurochirurgie [Saint Etienne], Centre Hospitalier Universitaire de Saint-Etienne (CHU de Saint-Etienne), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Service de Neurochirurgie [CHU Saint-Etienne], Centre Hospitalier Universitaire de Saint-Etienne [CHU Saint-Etienne] (CHU ST-E)-Université Jean Monnet - Saint-Étienne (UJM), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
Adult, Male, Inferior frontal gyrus, Superior parietal lobule, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, 050105 experimental psychology, Pathology and Forensic Medicine, White matter, 03 medical and health sciences, 0302 clinical medicine, Imaging, Three-Dimensional, medicine, Image Processing, Computer-Assisted, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Humans, 0501 psychology and cognitive sciences, Radiology, Nuclear Medicine and imaging, ComputingMilieux_MISCELLANEOUS, business.industry, [SCCO.NEUR]Cognitive science/Neuroscience, 05 social sciences, Extreme capsule, Anatomic Variation, Human brain, Fascicle, Healthy Volunteers, Frontal Lobe, medicine.anatomical_structure, Diffusion Tensor Imaging, Anisotropy, Surgery, Occipital Lobe, Anatomy, business, Neuroscience, 030217 neurology & neurosurgery, Diffusion MRI, Tractography
Abstract

Precise knowledge of the structural connectivity of white matter fascicles could yield new insights into function and is important for neurosurgical planning. Therefore, we aimed to provide a detailed map of the cortical terminations of the inferior fronto-occipital fascicle (IFOF), with special emphasis on putative inter-individual variations and hemispheric asymmetries. Deterministic diffusion tensor imaging-based tractography was used to perform virtual dissection of the IFOF in 20 healthy subjects. The IFOF was probed from a single seed region of interest placed within the external/extreme capsule, i.e. the white matter region of “obligatory passage” along the known path of the IFOF. This enabled to reconstruct all the fibers belonging to the IFOF and to provide the complete map of their cortical terminations. We observed widespread projections over a total of 11 cortical territories within the occipital, parietal, temporal and frontal lobes. Importantly, compared to previous studies we consistently found some inter-individual variability with several distinct patterns connecting subsets of the 11 cortical territories, and tangible differences between the two hemispheres. IFOF terminations within the superior parietal lobule were rightward lateralized, whereas terminations within the inferior frontal gyrus were leftward lateralized. Our results provide a clinically relevant map of IFOF’s cortical terminations, including intra- and inter-individual variations. Right–left differences in connectivity patterns might be related to known functional asymmetries in the human brain, and reinforce the general evidence that the IFOF likely supports distinct clinical features and functional roles according to the (affected) hemisphere, such as language and spatial attention.

Published
2018
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28. Use of quantitative tremor evaluation to enhance target selection during deep brain stimulation surgery for essential tremor

Author

Simone Hemm-Ode, Jean-Jacques Lemaire, Erik Schkommodau, Ashesh Shah, Jerome Coste, Institute for Medical and Analytical Technologies, School of Life Sciences (IMA), University of Applied Sciences and Arts Northwestern Switzerland (HES-SO), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), University of Applied Sciences and Arts Northwestern Switzerland (FHNW), German Society for Biomedical Engineering, Apport de l'accélérométrie à la stimulation cérébrale - 2011-A00774-37 - CHU de Clermont-Ferrand, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, and SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
medicine.medical_specialty, Deep brain stimulation, Essential tremor, business.industry, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, medicine.medical_treatment, Thalamus, Biomedical Engineering, Stimulation, medicine.disease, nervous system diseases, deep brain stimulation, Physical medicine and rehabilitation, thalamus, Evaluation methods, medicine, accelerometry, Medicine, [INFO.INFO-BI]Computer Science [cs]/Bioinformatics [q-bio.QM], business, Surgical treatment, essential tremor, Deep brain stimulation surgery
Abstract

Deep brain stimulation (DBS), an effective surgical treatment for Essential Tremor (ET), requires test stimulations in the thalamus to find the optimum site for permanent electrode implantation. During these test stimulations, the changes in tremor are only visually evaluated. This, along with other parameters, increases the subjectivity when comparing the efficacy of different thalamic nuclei. We developed a method to quantitatively evaluate tremor during the test stimulations of DBS surgery and applied to 6 ET patients undergoing this treatment. From the quantitative data collected, we identified effective stimulation amplitudes for every test stimulation position and compared it with the ones identified visually during the surgery. We also classified the data based on the thalamic nuclei in which the center of the stimulating contact was present during test stimulations. Results indicate that, to achieve the same reduction in tremor, on average, the stimulation amplitude identified by our method was 0.6 mA lower than those identified by visual evaluation. The comparison of the different thalamic nuclei showed that stimulations in the Ventro-oral and the Intermediolateral nuclei of the thalamus result in higher reduction in tremor for similar stimulation amplitudes as the frequently targeted Ventrointermediate nucleus. We conclude that our quantitative tremor evaluation method is more sensitive than the widely used visual evaluation. Using such quantitative methods will aid in identifying the optimum target structure for patients undergoing DBS.

Published
2015
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29. Resolution of isolated syringomyelia after removing thoracic disc herniation

Author

Yakouba Haro, Youssef El Ouadih, Rémi Chaix, Guillaume Coll, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
medicine.medical_specialty, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, 03 medical and health sciences, 0302 clinical medicine, Cerebrospinal fluid, Cerebrospinal fluid flow, Rare case, medicine, Humans, Choledochal cysts, ComputingMilieux_MISCELLANEOUS, business.industry, [SCCO.NEUR]Cognitive science/Neuroscience, General Medicine, medicine.disease, Spinal cord, Magnetic Resonance Imaging, Syringomyelia, Pathophysiology, 3. Good health, medicine.anatomical_structure, 030220 oncology & carcinogenesis, Surgery, Neurology (clinical), Radiology, business, Thoracic disc, 030217 neurology & neurosurgery
Abstract

Syringomyelia is an abnormal cystic dilatation of the spinal cord caused by excessive accumulation of CSF (cerebrospinal fluid). The pathophysiology remains complex and unelucidated. We report a rare case of resolution of cervico-thoracic syringomyelia after thoracic disc excision in a 3 months follow-up time.

Published
2018
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30. Cartographie du cerveau humain et stéréotaxie: principes et applications médicales

Author

Lemaire, Jean-Jacques, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, and SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

31. Noninvasive detection of alarming intracranial pressure changes by auditory monitoring in early management of brain injury: a prospective invasive versus noninvasive study

Author

Fabrice Giraudet, Aurélien Mulliez, Laurent Sakka, Bruno Pereira, Aurélie Thalamy, François Longeras, Paul Avan, Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER, Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Equipe Biophysique Neurosensorielle [Neuro-Dol], Neuro-Dol (Neuro-Dol), Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Neuro-Dol (Neuro-Dol), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
0301 basic medicine, Adult, Male, medicine.medical_specialty, Intracranial Pressure, Organ Dysfunction Scores, [SDV]Life Sciences [q-bio], Critical Care and Intensive Care Medicine, 03 medical and health sciences, 0302 clinical medicine, Cerebrospinal fluid, medicine, Humans, Prospective Studies, ComputingMilieux_MISCELLANEOUS, Intracranial pressure, Monitoring, Physiologic, integumentary system, business.industry, musculoskeletal, neural, and ocular physiology, Research, Brain, Cochlear electrophysiology, Fluid compartments, Middle Aged, humanities, 3. Good health, Surgery, nervous system diseases, Electrophysiological Phenomena, Intensive Care Units, 030104 developmental biology, ROC Curve, Brain Injuries, Breathing, Linear Models, Female, Radiology, business, Cochlear microphonic potential, Noninvasive monitoring, 030217 neurology & neurosurgery
Abstract

Background In brain-injured patients intracranial pressure (ICP) is monitored invasively by a ventricular or intraparenchymal transducer. The procedure requires specific expertise and exposes the patient to complications such as malposition, hemorrhage or infection. As inner-ear fluid compartments are connected to the cerebrospinal fluid space, ICP changes elicit subtle changes in the physiology of the inner ear. Notably, we previously demonstrated that the phase of cochlear microphonic potential (CM) generated by sound stimuli rotates with ICP. The aim of our study was to validate the monitoring of CM as a noninvasive method to follow ICP. Methods Non-invasive measure of CM-phase was compared to ICP recorded invasively in a prospective series of patients with acute brain injury managed in a neuro-intensive care unit. The study focused on patients with varying ICP and normal middle-ear function. Results In the 24 patients with less than 4 days of endotracheal ventilation and whose ICP fluctuated (50-hour data), we demonstrated close correlation between CM-phase rotation and ICP (average 1.26 degrees/mmHg). As a binary classifier, CM phase changes of 7–10 degrees signaled 7.5-mmHg ICP increases with a sensitivity of 83% and 19% fallout. Conclusion Reference methods to measure ICP require the surgical placement of a pressure transducer. Noninvasive CM-based monitoring of ICP might be beneficial to early management of brain-injured patients with initially preserved consciousness and to the diagnosis of neurological conditions, whenever invasive monitoring cannot be performed. Trial registration ClinicalTrials.gov NCT01685476, registered on 30 August 2012. Electronic supplementary material The online version of this article (doi:10.1186/s13054-017-1616-2) contains supplementary material, which is available to authorized users.

Published
2017
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32. Non-invasive intraoperative monitoring of cochlear function by cochlear microphonics during cerebellopontine-angle surgery

Author

Toufic Khalil, Stéphane Tringali, André Chays, Paul Avan, Béatriz Madero, Xavier Dubernard, A. Bazin, Thierry Mom, Blandine Lourenço, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Laboratoire des technologies de la microélectronique (LTM ), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Service ORL, Hôtel-Dieu, Equipe Biophysique Neurosensorielle [Neuro-Dol], Neuro-Dol (Neuro-Dol), Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Neuro-Dol (Neuro-Dol), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurologie [CHU Clermont-Ferrand], CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Centre Hospitalier Universitaire de Reims (CHU Reims), Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL), Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER, Service de Neurochirurgie [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand]

Subjects
Adult, Male, medicine.medical_specialty, Hearing loss, [SDV]Life Sciences [q-bio], Ischemia, Cerebellopontine Angle, Neurosurgical Procedures, 03 medical and health sciences, 0302 clinical medicine, Postoperative Complications, Trigeminal neuralgia, Monitoring, Intraoperative, otorhinolaryngologic diseases, medicine, Humans, Single-Blind Method, 030223 otorhinolaryngology, Hearing Loss, Intraoperative Complications, ComputingMilieux_MISCELLANEOUS, Aged, business.industry, Cochlear nerve, General Medicine, Neuroma, Acoustic, Middle Aged, medicine.disease, Cerebellopontine angle, Surgery, Cochlea, Dissection, Treatment Outcome, Otorhinolaryngology, Female, sense organs, Neurosurgery, medicine.symptom, business, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

In vestibular-schwannoma (VS) surgery, hearing-preservation rate remains low. Besides damage to the cochlear nerve, intraoperative cochlear ischemia is a potential cause of hearing loss. Here, we used non-invasive cochlear microphonic (CM) recordings to detect the cochlear vascular events of VS surgery. Continuous intraoperative CM monitoring, in response to 80–95 dB SPL, 1-kHz tone-bursts, was performed in two samples of patients undergoing retrosigmoid cerebellopontine-angle surgery: one for VS (n = 31) and one for vestibular neurectomy or vasculo-neural conflict causing intractable trigeminal neuralgia, harmless to hearing (n = 19, control group). Preoperative and postoperative hearings were compared as a function of intraoperative CM changes and their chronology. Monitoring was possible throughout except for a few tens of seconds when drilling or suction noises occurred. Four patterns of CM time course were identified, eventless, fluctuating, abrupt or progressive decrease. Only the VS group displayed the last two patterns, mainly during internal-auditory-canal drilling and the ensuing tumor dissection, always with postoperative loss of hearing as an end result. Conversely, eventless and fluctuating CM patterns could be associated with postoperative hearing loss when the cochlear nerve had been reportedly damaged, an event that CM is not meant to detect. Cochlear ischemia is a frequent event in VS surgery that leads to deafness. The findings that CM decrease raised no false alarm, and that CM fluctuations, insignificant in control cases, were easily spotted, suggest that CM intraoperative monitoring is a sensitive tool that could profitably guide VS surgery.

Published
2017
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33. Imagerie en tenseur de diffusion des relations thalamo-corticales dans le syndrome des pointes ondes continues du sommeil (pocs) cryptogénique

Author

Mathais, Sophie, Sarret, Catherine, Sontheimer, Anna, Lemaire, Jean-Jacques, Pereira, Bruno, Rosenberg, Sarah, D, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), CHU Clermont-Ferrand, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), Service de Neurochirurgie [CHU Clermont-Ferrand, CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Unité de Biostatistiques [CHU Clermont-Ferrand], Direction de la recherche clinique et de l’innovation [CHU Clermont-Ferrand] (DRCI), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), and Service de Neurochirurgie [CHU Clermont-Ferrand]

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

34. Conscious behaviors following bilateral pallido-thalamic low frequency stimulation in patients with continuing disorders of consciousness

Author

Jean-Jacques Lemaire, Anna Sontheimer, Bruno Pereira, Jérôme Coste, Sarah, D. Rosenberg, Catherine Sarret, Guillaume Coll, Jean Gabrillargues, Betty Jean, Thierry Gillart, Aurélien Coste, Basile Roche, Antony Kelly, Bénédicte Pontier, Fabien Feschet, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Unité de Biostatistiques [CHU Clermont-Ferrand], Direction de la recherche clinique et de l’innovation [CHU Clermont-Ferrand] (DRCI), CHU Clermont-Ferrand-CHU Clermont-Ferrand, Service de Neurologie [CHU Clermont-Ferrand], CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], Service de Pédiatrie Générale [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], Centre Jean Perrin [Clermont-Ferrand] (UNICANCER/CJP), UNICANCER, CHU de Clermont-Ferrand, Université Clermont Auvergne, Institut Pascal, SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Estaing [Clermont-Ferrand]

Subjects
[SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery
Abstract

Talk; National audience; Deep brain stmulaton (DBS) has been proposed to enable consciousness recovery. We studied clinical effects of bilateral pallido-thalamic low frequency stmulaton intended to overdrive neuronal actvity. Five patents were included. Primary outcome was the analysis of scores of the Coma Recovery Scale Revised (CRS-R; 0-23). Statstcal analyses used random-effects models accountng between and within patent variability due to repeated measurements. We observed statstcally signifcant improvement of CRS-R during DBS-ON versus baseline (P1, P3) and CO-On versus baseline (P3). For the 5 patents auditory, visual, motor, oromotor-verbal, communicaton subscores of CRS-R were signifcantly improved.

Published
2017

35. Cerebral quantitative DTI and tractography in 25 patients with PLP1-related disorders

Author

Anna Sontheimer, Jean-Jacques Lemaire, Odile Boespflug-Tanguy, Bruno Pereira, Catherine Sarret, Basile Roche, Jerome Coste, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Pédiatrie Générale [CHU Clermont-Ferrand], CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Unité de Biostatistiques [CHU Clermont-Ferrand], Direction de la recherche clinique et de l’innovation [CHU Clermont-Ferrand] (DRCI), Hôpital Robert Debré, European Paediatric Neurology Society (EPNS), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], and CHU Gabriel Montpied [Clermont-Ferrand]

Subjects
medicine.medical_specialty, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Grey matter, Corpus callosum, 03 medical and health sciences, 0302 clinical medicine, 030225 pediatrics, Fractional anisotropy, Spastic, Medicine, Effective diffusion coefficient, [SDV.MHEP.PED]Life Sciences [q-bio]/Human health and pathology/Pediatrics, business.industry, General Medicine, medicine.disease, 3. Good health, medicine.anatomical_structure, nervous system, Pediatrics, Perinatology and Child Health, Neurology (clinical), Radiology, business, Paraplegia, 030217 neurology & neurosurgery, Diffusion MRI, Tractography
Abstract

Poster; International audience; Objective: We used brain diffusion tensor imaging (DTI) and tractography to analyze the severity of patients with PLP1-related disorders (Pelizaeus- Merzbacher disease and spastic paraplegia type 2). Methods: Twenty-five male patients (ranged from 0.7 to 43.5 years) with PLP1- related disorder were included in this DTI study. Subjects were classified according to best motor function acquired before 5 years into five categories (from PMD0 without motor acquisition to PMD4 with autonomous walking). We performed a quantitative DTI study on different brain regions of white or grey matter, tracking of the cortico-spinal fascicles (CSF) and whole brain tractography. Results: No difference was observed between severity groups on quantitative DTI parameters (apparent diffusion coefficient, fractional anisotropy, radial and axial diffusivities) using two different DTI software. Tractography of the CSF did not reveal significant differences that could permit to distinguish severity groups. On the contrary, whole brain tractography seems to be a more relevant approach with high abnormalities in fibers from semi-oval centers and corpus callosum linked to clinical severity. Conclusion: To distinguish early the clinical severity of patients with PLP- pathies is a present challenge to consider early therapeutical approaches in these disorders. Tractography of whole brain could be an interesting way of classifying patients and following disease’s severity.

Published
2017
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36. 3D visualization of intraoperative stimulation test results in deep brain stimulation

Author

Ashesh Shah, Fabiola Alonso, Jean-Jacques Lemaire, Daniela Pison, Jérôme Coste, Karin Wårdell, Erik Schkommodau, Simone Hemm-Ode, Institute for Medical and Analytical Technologies, School of Life Sciences (IMA), University of Applied Sciences and Arts Northwestern Switzerland (FHNW), Department of Biomedical Engineering, Linköping University (LIU), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, clinical study 2011-A00774-37/AU905, CPP Sud-Est 6, Clermont-Ferrand, France, EMBEC-NBC, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
[SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.IB]Life Sciences [q-bio]/Bioengineering
Abstract

Poster; International audience; I. INTRODUCTIONDeep brain stimulation (DBS) is a treatment for movement disorders such as Essential Tremor (ET). The implant position of the electrode is crucial. After preoperative surgical planning and intraoperative tests, the collected data is only “mentally” visualized and analyzed by the physician to decide on the optimal implant position of the DBS lead. We propose a method to combine and visually present this multitude of data for surgical decision making using patient-specific simulations of the electric field (EF) distribution, intraoperative accelerometry based tremor evaluations and direct-targeting technique of DBS.II. METHODFive ET patients participating in a clinical study (Ref: 2011-A00774-37/AU905, CPP Sud-Est 6, Clermont-Ferrand, France; written informed consent) were included in the presented protocol in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 and 2008. Patients underwent routine stereotactic bilateral implantation of the DBS electrodes in the ventro-intermediate nucleus of the thalamus (VIM) [1].During planning, the target structure and the anatomical neighbours were outlined on patient images and an anatomical target was selected. Two microelectrodes were intraoperatively inserted per hemisphere on parallel trajectories. Stimulation tests were performed on 5 to 10 positions pertrajectory with several stimulation amplitudes per position to evaluate side effects and changes in tremor using an accelerometer fixed to the patient's wrist [2]. To estimate the extension of the stimulation, the EF was simulated using a finite-element model for several amplitudes per position related to different tremor improvements [3]. To identify the optimal implant position for chronic stimulation, we summarized all data in "Improvement Maps” by assigning to each voxel in the stimulation test region the highest improvement in tremor. Improvements were visualized on the patient-specific anatomical outlines using a green color scale and simulations of side-effects in red (Paraview, Kitware Inc). Postoperatively the optimal implant positions with the highest improvement were identified for the five patients.III. RESULTSThe clinical teams were able to identify the optimal implant positions with more ease and in less time compared to the routine discussion using pen and paper. Additionally, for 7 out of the 9 improvement maps, the highest improvement region was found to be in the posterior subthalamic area inferior and posterior to the surgical target, the VIM.IV. CONCLUSIONSVisual analysis of the results of intraoperative stimulation tests in form of improvement maps assists the clinicians in determining the optimal implant location of the chronic DBS lead and in comparing results between patients.

Published
2017

37. fMRI study of graduated emotional charge for detection of covert activity using passive listening to narratives

Author

Sontheimer , Anna, Vassal , François, Jean , Betty, Feschet , Fabien, Lubrano , Vincent, Lemaire , Jean-Jacques, Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne (Clermont Ferrand 1) ( UdA ), Institut Pascal - Clermont Auvergne ( IP ), Sigma CLERMONT ( Sigma CLERMONT ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-Hôpital Gabriel Montpied, Service de Neurochirurgie [Saint Etienne], Centre Hospitalier Universitaire de Saint-Etienne ( CHU de Saint-Etienne ), Centre Hospitalier Universitaire de Clermont-Ferrand, Hôpital Purpan [Toulouse], Université d'Auvergne - Clermont-Ferrand I (UdA), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Centre Hospitalier Universitaire de Saint-Etienne (CHU de Saint-Etienne), CHU Toulouse [Toulouse], Lemaire, Jean-Jacques, SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Service de Neurochirurgie [CHU Saint-Etienne], Centre Hospitalier Universitaire de Saint-Etienne [CHU Saint-Etienne] (CHU ST-E)-Université Jean Monnet - Saint-Étienne (UJM), Toulouse Neuro Imaging Center ( ToNIC ), Université Toulouse III - Paul Sabatier ( UPS ), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Hôpital Purpan [Toulouse], and CHU Toulouse [Toulouse]-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale ( INSERM )

Subjects
voice familiarity, [ INFO.INFO-IM ] Computer Science [cs]/Medical Imaging, semantic memory, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, speech, [SCCO.NEUR] Cognitive science/Neuroscience, autobiographical memory, [INFO.INFO-IM] Computer Science [cs]/Medical Imaging, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], [ SDV.NEU.NB ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [ SCCO.NEUR ] Cognitive science/Neuroscience, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [ SDV.IB.IMA ] Life Sciences [q-bio]/Bioengineering/Imaging, disorders of consciousness
Abstract

International audience; —Detection of awareness in patients with consciousness disorders is a challenge that can be facilitated by functional neuroimaging. We elaborated a functional magnetic resonance imaging (fMRI) protocol to detect cov-ert activity in altered states of consciousness. We hypothesized that passive listening to narratives with graduated emotional charge triggers graduated cerebral activations. The fMRI protocol was designed in healthy subjects for further clinical applications. The emotional charge was graduated using voice familiarity and long-term declarative memory content: low emotional charge, unknown person telling general semantic memory; mean emotional charge, relative telling the same narratives; high emotional charge, same relative telling autobiographical memory. Autobiographical memory was subdivided into semantic autobiographical memory and episodic autobiographical memory. The protocol proved efficient at triggering graduated cere-bral activations: low emotional charge, superior temporal gyri and sulci; mean emotional charge, same as low emotional charge plus bilateral premotor cortices and left inferior frontal gyrus; high emotional charge, cingulate, temporal, frontal, prefrontal and angular areas, thalamus and cerebellum. Semantic autobiographical memory revealed larger activations than episodic autobiographical memory. Independent ROI analysis confirmed the prepon-derant contribution of narratives with autobiographical memory content in triggering cerebral activation, not only in autobiographical memory-sensitive areas, but also in voice-sensitive, language-sensitive and semantic memory-sensitive areas. Ó 2017 The Authors. Published by Elsevier Ltd on behalf of IBRO. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

Published
2017
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38. Natural course and prognosis of anaplastic gangliogliomas: a multicenter retrospective study of 43 cases from the French Brain Tumor Database

Author

Luc Bauchet, Eric Bord, Valérie Rigau, Johan Pallud, Bertrand Muckenstrum, Guillaume Gauchotte, Louis-Marie Terrier, Walid Farah, Patrick François, Isabelle Filipiak, Bertrand Debono, Phong Dam Hieu, Bernard Irthum, Audrey Rousseau, Pierre-Hugues Roche, Catherine Godfraind, Pierre-Jean Le Reste, Marie-Bernadette Delisle, Agnès Caille, Philippe Metellus, Stéphane Velut, Alain Czorny, Anne-Marie Bergemer-Fouquet, Philippe Menei, D. Liguoro, Michel Wager, Marie-Hélène Aubriot-Lorton, Emmanuel Mandonnet, Pascale Varlet, Jimmy Voirin, Serge Milin, Sonia Zouaoui, Kevin Janot, Ilyess Zemmoura, Hugues Loiseau, Jacques Guyotat, Marc Zanello, Philippe Cornu, Evelyne Emery, Aymeric Amelot, Vincent Lubrano, Guillaume Lot, Fabien Almairac, Dominique Figarella-Branger, Anne Vital, Emmanuelle Uro-Coste, Institut des Neurosciences de Montpellier (INM), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Centre référent Sclérose Latérale Amyotrophique [CHRU Montpellier] (SLA CHRU Montpellier), Université Montpellier 1 (UM1)-Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Université Paris Descartes - Faculté de Médecine (UPD5 Médecine), Université Paris Descartes - Paris 5 (UPD5), UNICANCER - Institut régional du Cancer Montpellier Val d'Aurelle (ICM), CRLCC Val d'Aurelle - Paul Lamarque, Physiologie de la reproduction et des comportements [Nouzilly] (PRC), Institut National de la Recherche Agronomique (INRA)-Institut Français du Cheval et de l'Equitation [Saumur] (IFCE)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), Centre d’Investigation Clinique [Tours] CIC 1415 (CIC ), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Hôpital Bretonneau-Université de Tours (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut de Biologie Valrose (IBV), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Service de Pathologie [CHU de Dijon], Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Service de neurochirurgie [Brest], Hôpital de la Cavale Blanche - CHRU Brest (CHU - BREST ), CIC Brest, Université de Brest (UBO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hôpital de la Cavale Blanche, Service de neurochirurgie [CHU Rouen], CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Service d'anatomie pathologique et histologie-cytologie [Rangueil], Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Sérine protéases et physiopathologie de l'unité neurovasculaire, Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de neurochirurgie [CHU Dijon], Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Laboratoire de Neuropathologie, Université Catholique de Louvain = Catholic University of Louvain (UCL)-Clinique Saint-Luc, Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Chemistry, Oncogenesis, Stress and Signaling (COSS), Université de Rennes (UR)-CRLCC Eugène Marquis (CRLCC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service de neurochirurgie, CHU Bordeaux [Bordeaux]-Groupe hospitalier Pellegrin, Service Neurochirurgie [CHU Toulouse], Pôle Neurosciences [CHU Toulouse], Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Laboratoire Kastler Brossel (LKB (Lhomond)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Service de neurochirurgie [CHU Angers], Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM), Service de neurochirurgie [CHU Marseille], Université de la Méditerranée - Aix-Marseille 2-Assistance Publique - Hôpitaux de Marseille (APHM)- Hôpital de la Timone [CHU - APHM] (TIMONE), Cibles moléculaires et thérapeutiques de la maladie d'Alzheimer (CIMoTHeMA), Université de Poitiers, Design and Application of Innovative Local Treatments in Glioblastoma (CRCINA-ÉQUIPE 17), Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCINA), Université d'Angers (UA)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université d'Angers (UA)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes), Laboratoire Mouvement Adaptation Cognition (MAC), Université Bordeaux Segalen - Bordeaux 2-Centre National de la Recherche Scientifique (CNRS), Cellules souches leucémiques et thérapeuthiques, Université de Poitiers-Centre hospitalier universitaire de Poitiers (CHU Poitiers), Université Sorbonne Paris Cité (USPC), Imagerie et cerveau (iBrain - Inserm U1253 - UNIV Tours ), Université de Tours (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), Service d'Anatomo-Cyto-Pathologie et de NeuroPathologie [Hôpital de la Timone - APHM] (ACPNP), Aix Marseille Université (AMU)- Hôpital de la Timone [CHU - APHM] (TIMONE), Archimedes Pharma®, Institut des Neurosciences de Montpellier - Déficits sensoriels et moteurs (INM), Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier)-Université Montpellier 1 (UM1), UNICANCER - Institut régional du Cancer [Montpellier] (ICM), Centre National de la Recherche Scientifique (CNRS)-Université de Tours-Institut Français du Cheval et de l'Equitation [Saumur]-Institut National de la Recherche Agronomique (INRA), CIC 1415, Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Francois Rabelais [Tours], Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Service de neurochirurgie [Rouen], Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Hôpital de Rangueil, CHU Toulouse [Toulouse], Service de neurochirurgie [CHU de Dijon], Université Catholique de Louvain (UCL)-Clinique Saint-Luc, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-Hôpital Gabriel Montpied, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-CRLCC Eugène Marquis (CRLCC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Imagerie cérébrale et handicaps neurologiques, Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Design and Application of Innovative Local Treatments in Glioblastoma (CRCINA - Département NOHMAD - Equipe 17), Centre de recherche de Cancérologie et d'Immunologie / Nantes - Angers (CRCINA), Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Imagerie et cerveau, Université de Tours-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National de la Recherche Agronomique (INRA)-Institut Français du Cheval et de l'Equitation [Saumur]-Université de Tours-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Régional Universitaire de Tours (CHRU Tours)-Hôpital Bretonneau-Université de Tours-Institut National de la Santé et de la Recherche Médicale (INSERM), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut National de la Santé et de la Recherche Médicale (INSERM)-CRLCC Eugène Marquis (CRLCC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Département de Neurochirurgie [CHU Toulouse], Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA), and Institut National de la Recherche Agronomique (INRA)-Institut Français du Cheval et de l'Equitation [Saumur]-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Adult, Male, Cancer Research, medicine.medical_specialty, Pathology, Adolescent, Databases, Factual, [SDV]Life Sciences [q-bio], Clinical Investigations, Brain tumor, [SDV.CAN]Life Sciences [q-bio]/Cancer, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, Ganglioglioma, cerebral malignancy, surgery, Young Adult, 03 medical and health sciences, 0302 clinical medicine, medicine, Humans, Progression-free survival, Pathological, Survival rate, ComputingMilieux_MISCELLANEOUS, Aged, Retrospective Studies, Intracranial pressure, Brain Neoplasms, business.industry, Retrospective cohort study, Middle Aged, medicine.disease, Combined Modality Therapy, 3. Good health, Survival Rate, Oncology, 030220 oncology & carcinogenesis, Anaplastic Ganglioglioma, Disease Progression, Female, Neurology (clinical), Radiology, prognosis, business, 030217 neurology & neurosurgery, anaplastic ganglioglioma, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, Follow-Up Studies
Abstract

International audience; Background - Anaplastic gangliogliomas (GGGs) are rare tumors whose natural history is poorly documented. We aimed to define their clinical and imaging features and to identify prognostic factors. Methods - Consecutive cases of anaplastic GGGs in adults prospectively entered into the French Brain Tumor Database between March 2004 and April 2014 were screened. After diagnosis was confirmed by pathological review, clinical, imaging, therapeutic, and outcome data were collected retrospectively. Results - Forty-three patients with anaplastic GGG (median age, 49.4 y) from 18 centers were included. Presenting symptoms were neurological deficit (37.2%), epileptic seizure (37.2%), or increased intracranial pressure (25.6%). Typical imaging findings were unifocal location (94.7%), contrast enhancement (88.1%), central necrosis (43.2%), and mass effect (47.6%). Therapeutic strategy included surgical resection (95.3%), adjuvant radiochemotherapy (48.8%), or radiotherapy alone (27.9%). Median progression-free survival (PFS) and overall survival (OS) were 8.0 and 24.7 months, respectively. Three- and 5-year tumor recurrence rates were 69% and 100%, respectively. The 5-year survival rate was 24.9%. Considering unadjusted significant prognostic factors, tumor midline crossing and frontal location were associated with shorter OS. Temporal and parietal locations were associated with longer and shorter PFS, respectively. None of these factors remained statistically significant in multivariate analysis. Conclusions - We report a large series providing clinical, imaging, therapeutic, and prognostic features of adult patients treated for an intracerebral anaplastic GGG. Our results show that pathological diagnosis is difficult, that survivals are only slightly better than for glioblastomas, and that complete surgical resection followed with adjuvant chemoradiotherapy offers longer survival.

Published
2017
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39. The Enhancement of PVDF Pyroelectricity (Pyroelectric Coefficient and Dipole Moment) by Inclusions

Author

Michel Aillerie, Chafic Salame, M. Anwar Batal, Toni Khalil, Rawad Hamdan, K. Al Abdullah, Jean Zaraket, SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Lebanese University [Beirut] (LU), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Michel AIllerie, Chafic Salame, Panagiotis Papagiorgas, Université de Lorraine (UL)-CentraleSupélec, Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
Materials science, Fraction (chemistry), 02 engineering and technology, Dielectric, 01 natural sciences, Condensed Matter::Materials Science, chemistry.chemical_compound, Optics, 0103 physical sciences, Physics::Atomic and Molecular Clusters, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Condensed matter physics, Condensed Matter::Other, business.industry, Small volume, [SPI.NRJ]Engineering Sciences [physics]/Electric power, 021001 nanoscience & nanotechnology, Pyroelectricity, [SPI.TRON]Engineering Sciences [physics]/Electronics, Moment (mathematics), Dipole, chemistry, Volume fraction, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, 0210 nano-technology, business, Fluoride
Abstract

The pyroelectricity of Poly vinylidene fluoride (PVDF) is improved by incorporation inclusions in it. The best inclusions properties (volume fraction, dielectric constant, pyroelectric coefficient, molecular weight and density) were determined, which increase the pyroelectrical coefficient and dipole moment of PVDF. For very small volume fraction (

Published
2017
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40. The Effect of Electrical stress under temperature in the characteristics of PV Solar Modules

Author

Jean Zaraket, Chafic Salame, Georgios A. Vokas, Michel Aillerie, Toni Khalil, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Lebanese University [Beirut] (LU), Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Michel AIllerie, Chafic Salame, Panagiotis Papagiorgas, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
Materials science, Silicon, chemistry.chemical_element, 02 engineering and technology, 7. Clean energy, 01 natural sciences, Stress level, law.invention, Stress (mechanics), Solar module, law, 0103 physical sciences, Solar cell, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], integumentary system, business.industry, [SPI.NRJ]Engineering Sciences [physics]/Electric power, 021001 nanoscience & nanotechnology, Power (physics), [SPI.TRON]Engineering Sciences [physics]/Electronics, Normal functioning, Solar cell efficiency, chemistry, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Optoelectronics, 0210 nano-technology, business
Abstract

The effect of electrical stress under temperature, in dark and light conditions, on the performance of PV solar modules was evaluated. The forward and reverse characteristics I-V and C-V of a commercial silicon solar module have been measured in dark and light conditions after 10 min for each dose of stress. Experimental evidence showed that different stress levels of reverse currents under temperature is confirmed to be a major degrading factor and result in affecting the performance, efficiency, and power of a solar cell and module. The paper contributes to the research on the adverse effects of reverse currents under temperature on the normal functioning of cells and solar modules.

Published
2017
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41. Utility of S100B Serum Level for the Determination of Concussion in Male Rugby Players

Author

Bruno Pereira, Mathieu Abbot, Aurélien Coste, Damien Bouvier, Vincent Sapin, Thomas Duret, Thibault Stiernon, Jean Chazal, Génétique, Reproduction et Développement (GReD ), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), service de Biostatistiques, DRCI, CHU Clermont-Ferrand, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], Equipe de Recherche en Signal et Imagerie Medicale (ERIM-ERI 14), Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Biochimie, Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
Male, medicine.medical_specialty, Sports medicine, [SDV]Life Sciences [q-bio], Football, Poison control, Physical Therapy, Sports Therapy and Rehabilitation, S100 Calcium Binding Protein beta Subunit, Sensitivity and Specificity, 03 medical and health sciences, Cognition, 0302 clinical medicine, Concussion, Humans, Medicine, Blood test, Orthopedics and Sports Medicine, Prospective Studies, Championship, Prospective cohort study, Brain Concussion, medicine.diagnostic_test, business.industry, Incidence, Incidence (epidemiology), 030229 sport sciences, medicine.disease, Athletic Injuries, Luminescent Measurements, Physical therapy, business, human activities, 030217 neurology & neurosurgery
Abstract

The incidence of concussion in professional direct-contact sports, particularly in rugby, has increased in recent years. To date, cognitive assessment is the most common means of determining whether a concussed player can return to the game. Serum S100B assay, an objective blood test known to be useful in brain injury management, may offer a novel additional approach to the management of concussed male rugby players. The aim of this study was to investigate the S100B utility for the determination of concussion in a professional 15-players-a-side rugby team. Thirty-nine male rugby players were included in a prospective study during the 2014–2015 French championship season. Serum sampling was carried out several times at baseline and after a match and/or a concussion, at set times (2, 36 h). Serum S100B concentrations were determined using chemiluminescence immunoassay on a Roche Diagnostics® instrument. The players’ basal serum S100B was stable during the season and was not correlated with anthropometric data, body composition, or creatine kinase concentration. A significant increase in S100B concentration within 2 h after a game (without concussion) was observed. This increase was correlated with the number of body collisions during a match. Seventy-seven assays were performed 36 h after a game, including the follow-up of five concussed players. Thirty-six hours after a match, an increase of a minimum of 20 % compared with individual basal concentrations identified concussion with 100 % sensitivity and 81 % specificity. S100B measured 36 h after a match is thus a discriminating test to identify concussion in a male rugby player, with a 100 % negative predictive value.

Published
2017
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42. Pattern of Closure of Skull Base Synchondroses in Crouzon Syndrome

Author

Michel Zerah, Guillaume Coll, Nathalie Pham-Dang, Céline Botella, Corine Collet, Federico Di Rocco, Laurent Sakka, Eric Arnaud, Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de neurochirurgie pédiatrique [CHU Necker], CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Systèmes RF (XLIM-SRF), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand-CHU Clermont-Ferrand

Subjects
Male, Population, Synchondrosis, Neurosurgical Procedures, Craniosynostosis, 03 medical and health sciences, 0302 clinical medicine, Imaging, Three-Dimensional, Medicine, Humans, Receptor, Fibroblast Growth Factor, Type 2, education, Child, ComputingMilieux_MISCELLANEOUS, Retrospective Studies, Skull Base, education.field_of_study, Foramen magnum, business.industry, Craniofacial Dysostosis, Infant, Newborn, Crouzon syndrome, Infant, Anatomy, Cranial Sutures, Plastic Surgery Procedures, medicine.disease, Skull, medicine.anatomical_structure, 030220 oncology & carcinogenesis, Case-Control Studies, Child, Preschool, Time course, Disease Progression, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Surgery, Female, Neurology (clinical), business, Tomography, X-Ray Computed, 030217 neurology & neurosurgery
Abstract

Background The age of closure of skull base synchondroses has never been analyzed in a homogenous population of children with Crouzon syndrome. Methods A retrospective case-control study was performed on 30 Crouzon children (17 male, 13 female) aged 1 month to 12.48 years with Fibroblast Growth Factor Receptor type 2 mutation. Eleven synchondroses were analyzed on millimetric computed tomodensitometric slices before surgery. Syndromic patients were compared with a series of 235 healthy children previously published. Results Synchondrosis closure follows a global pattern that occurs earlier in Crouzon syndrome than in controls ( P ≤ 0.002). Synchondrosis fusion starts at 10 months of age with posterior intraoccipital synchondroses and lambdoid sutures, followed by occipitomastoid synchondroses between 1.85 (right) and 2.27 years (left) and anterior intraoccipital synchondroses at approximately 2.80 years. Time to complete fusion varies considerably according to the synchondroses. Spheno-occipital and petro-occipital synchondroses fuse last, at approximately 3 years old. Conclusions In children with Crouzon syndrome, synchondrosis closure occurs prematurely, with a time course specific to each synchondrosis.

Published
2017
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43. Intraoperative acceleration measurements to quantify improvement in tremor during deep brain stimulation surgery

Author

Jean-Jacques Lemaire, W. M. Michael Schüpbach, Claudio Pollo, Ethan Taub, Simone Hemm-Ode, Jerome Coste, Erik Schkommodau, Raphael Guzman, Ashesh Shah, Institute for Medical and Analytical Technologies, School of Life Sciences (IMA), University of Applied Sciences and Arts Northwestern Switzerland (FHNW), Thérapie guidée par l'image (TGI), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Departments of Neurosurgery and Biomedicine, University Hospital Basel [Basel], Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute (ICM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Department of Neurology, University Hospital, Bern-University of Bern, Department of Neurosurgery, University Hospital, Bern, This research was funded by the Swiss National Science Foundation and partly by the Germainede Staël program of the Swiss Academy of Engineering Sciences. The experimental procedures were approved by the respective Institutional Ethics Committee (Center1: 2011-A00774-37/AU905, Center 2: 2365—multicenter study together with the UniversityHospital in Basel), Apport de l'accélérométrie à la stimulation cérébrale - 2011-A00774-37 - CHU de Clermont-Ferrand, SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)-SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and Coste, Jérôme

Subjects
medicine.medical_specialty, Movement disorders, Deep brain stimulation, Parkinson's disease, medicine.medical_treatment, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, 0206 medical engineering, Acceleration, Biomedical Engineering, 610 Medicine & health, 02 engineering and technology, Wrist, Neurosurgical Procedures, 03 medical and health sciences, 0302 clinical medicine, Physical medicine and rehabilitation, Tremor, Medicine, Humans, Lead (electronics), Intraoperative monitoring, [SDV.IB] Life Sciences [q-bio]/Bioengineering, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, Movement Disorders, Essential tremor, business.industry, [SDV.NEU.NB] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Brain, medicine.disease, 020601 biomedical engineering, Computer Science Applications, Electrodes, Implanted, nervous system diseases, medicine.anatomical_structure, Physical therapy, Parkinson’s disease, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Implant, medicine.symptom, business, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

International audience; Deep brain stimulation (DBS) surgery is extensively used in the treatment of movement disorders. Nevertheless, methods to evaluate the clinical response during intraoperative stimulation tests to identify the optimal position for the implantation of the chronic DBS lead remain subjective. In this paper, we describe a new, versatile method for quantitative intraoperative evaluation of improvement in tremor with an acceleration sensor that is mounted on the patient's wrist during surgery. At each anatomical test position, the improvement in tremor compared to the initial tremor is estimated on the basis of extracted outcome measures. This method was tested on 15 tremor patients undergoing DBS surgery in two centers. Data from 359 stimulation tests were acquired. Our results suggest that accelerometric evaluation detects tremor changes more sensitively than subjective visual ratings. The effective stimulation current amplitudes identified from the quantitative data (1.1 ± 0.8 mA) are lower than those identified by visual evaluation (1.7 ± 0.8 mA) for similar improvement in tremor. Additionally, if these data had been used to choose the chronic implant position of the DBS lead, 15 of the 26 choices would have been different. These results show that our method of accelerometric evaluation can potentially improve DBS targeting.

Published
2017
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44. Assessment of citalopram and escitalopram on neuroblastoma cell lines. Cell toxicity and gene modulation

Author

Laurent Sakka, Valérie Sylvain-Vidal, Guillaume Coll, Maryse Chalus, Nathalie Delétage, Stéphane Gobron, Youssef Aissouni, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Neuronax SAS, Neuro-Dol (Neuro-Dol), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Pharmacologie fondamentale et clinique de la douleur, Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université d'Auvergne - Clermont-Ferrand I (UdA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Helixio Biopôle Clermont-Limagne [Saint-Beauzire], Institut des Sciences du Mouvement Etienne Jules Marey (ISM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), CLEMENCON, EMILIE, Centre de génétique moléculaire (CGM), Centre National de la Recherche Scientifique (CNRS), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), and SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
0301 basic medicine, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, escitalopram, [SDV]Life Sciences [q-bio], [SDV.CAN]Life Sciences [q-bio]/Cancer, Pharmacology, Citalopram, behavioral disciplines and activities, 03 medical and health sciences, neuroblastoma, 0302 clinical medicine, Neural Stem Cells, gene modulation, Glioma, Neuroblastoma, mental disorders, MYCN, medicine, Humans, Escitalopram, Gene Regulatory Networks, citalopram, Cytotoxicity, Chemistry, medicine.disease, Fold change, 3. Good health, [SDV] Life Sciences [q-bio], 030104 developmental biology, Oncology, Cell culture, 030220 oncology & carcinogenesis, Toxicity, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, Selective Serotonin Reuptake Inhibitors, Research Paper, medicine.drug
Abstract

International audience; Selective serotonin reuptake inhibitors (SSRI) are common antidepressants which cytotoxicity has been assessed in cancers notably colorectal carcinomas and glioma cell lines. We assessed and compared the cytotoxicity of 2 SSRI, citalopram and escitalopram, on neuroblastoma cell lines. The study was performed on 2 non-MYCN amplified cell lines (rat B104 and human SH-SY5Y) and 2 human MYCN amplified cell lines (IMR32 and Kelly). Citalopram and escitalopram showed concentration-dependent cytotoxicity on all cell lines. Citalopram was more cytotoxic than escitalopram. IMR32 was the most sensitive cell line. The absence of toxicity on human primary Schwann cells demonstrated the safety of both molecules for myelin. The mechanisms of cytotoxicity were explored using gene-expression profiles and quantitative real-time PCR (qPCR). Citalopram modulated 1 502 genes and escitalopram 1 164 genes with a fold change ≥ 2. 1 021 genes were modulated by both citalopram and escitalopram; 481 genes were regulated only by citalopram while 143 genes were regulated only by escitalopram. Citalopram modulated 69 pathways (KEGG) and escitalopram 42. Ten pathways were differently modulated by citalopram and escitalopram. Citalopram drastically decreased the expression of MYBL2, BIRC5 and BARD1 poor prognosis factors of neuroblastoma with fold-changes of-107 (p

Published
2017
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45. A novel assistive method for rigidity evaluation during deep brain stimulation surgery using acceleration sensors

Author

Erik Schkommodau, Jean-Jacques Lemaire, Philippe Derost, Ashesh Shah, Jerome Coste, Raphael Guzman, Ethan Taub, Simone Hemm, Institute for Medical and Analytical Technologies, School of Life Sciences (IMA), University of Applied Sciences and Arts Northwestern Switzerland (FHNW), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Departments of Neurosurgery and Biomedicine, University Hospital Basel [Basel], Neuro-Psycho Pharmacologie des Systèmes Dopimanégiques sous-corticaux (NPsy-Sydo), CHU Clermont-Ferrand-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurologie [CHU Clermont-Ferrand], CHU Estaing [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU de Clermont-Ferrand, Université Clermont Auvergne, Institut Pascal, Apport de l'accélérométrie à la stimulation cérébrale - 2011-A00774-37 - CHU de Clermont-Ferrand, Thérapie guidée par l'image (TGI), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), This research was funded by the Swiss National Science Foundation as a part of the project205321_135285 and partly by the Germaine de Stael program of the Swiss Academy ofEngineering Sciences. We acknowledge and thank Prof. F. Durif, Dr. M. Ulla, and Dr. A.Marques of the Department of Neurology at the CHU Clermont-Ferrand, France, and Ms. BiancaRaffaelli and Prof. Dr. Peter Fuhr of the Department of Neurology at the University Hospital ofBasel, Switzerland, for performing the routine passive movements for rigidity evaluations.The clinical use of the afore-described data-recording system for the purpose of intraoperativeand postoperative symptom evaluation in the framework of this study was approved by theinstitutional review boards of the University Hospital in Clermont-Ferrand (France) and theUniversity Hospital of Basel (Switzerland)., CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand-CHU Estaing [Clermont-Ferrand], SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)-SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, and SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
medicine.medical_specialty, Deep brain stimulation, Movement disorders, Parkinson's disease, medicine.medical_treatment, fields of Forel, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Deep Brain Stimulation, Movement, 0206 medical engineering, Stimulation, Rigidity (psychology), 02 engineering and technology, Wrist, Accelerometer, Neurosurgical Procedures, 03 medical and health sciences, 0302 clinical medicine, Physical medicine and rehabilitation, medicine, Humans, Electrodes, functional neurosurgery, Aged, subthalamic nucleus, business.industry, Parkinson Disease, General Medicine, Middle Aged, medicine.disease, 020601 biomedical engineering, quantification, Muscle Rigidity, Subthalamic nucleus, medicine.anatomical_structure, rigidity, Physical therapy, acceleration sensor, intraoperative, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], [SDV.IB]Life Sciences [q-bio]/Bioengineering, medicine.symptom, business, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

OBJECTIVEDespite the widespread use of deep brain stimulation (DBS) for movement disorders such as Parkinson's disease (PD), the exact anatomical target responsible for the therapeutic effect is still a subject of research. Intraoperative stimulation tests by experts consist of performing passive movements of the patient's arm or wrist while the amplitude of the stimulation current is increased. At each position, the amplitude that best alleviates rigidity is identified. Intrarater and interrater variations due to the subjective and semiquantitative nature of such evaluations have been reported. The aim of the present study was to evaluate the use of an acceleration sensor attached to the evaluator's wrist to assess the change in rigidity, hypothesizing that such a change will alter the speed of the passive movements. Furthermore, the combined analysis of such quantitative results with anatomy would generate a more reproducible description of the most effective stimulation sites.METHODSTo test the reliability of the method, it was applied during postoperative follow-up examinations of 3 patients. To study the feasibility of intraoperative use, it was used during 9 bilateral DBS operations in patients suffering from PD. Changes in rigidity were calculated by extracting relevant outcome measures from the accelerometer data. These values were used to identify rigidity-suppressing stimulation current amplitudes, which were statistically compared with the amplitudes identified by the neurologist. Positions for the chronic DBS lead implantation that would have been chosen based on the acceleration data were compared with clinical choices. The data were also analyzed with respect to the anatomical location of the stimulating electrode.RESULTSOutcome measures extracted from the accelerometer data were reproducible for the same evaluator, thus providing a reliable assessment of rigidity changes during intraoperative stimulation tests. Of the 188 stimulation sites analyzed, the number of sites where rigidity-suppressing amplitudes were found increased from 144 to 170 when the accelerometer evaluations were considered. In general, rigidity release could be observed at significantly lower amplitudes with accelerometer evaluation (mean 0.9 ± 0.6 mA) than with subjective evaluation (mean 1.4 ± 0.6 mA) (p < 0.001). Of 14 choices for the implant location of the DBS lead, only 2 were the same for acceleration-based and subjective evaluations. The comparison across anatomical locations showed that stimulation in the fields of Forel ameliorates rigidity at similar amplitudes as stimulation in the subthalamic nucleus, but with fewer side effects.CONCLUSIONSThis article describes and validates a new assistive method for assessing rigidity with acceleration sensors during intraoperative stimulation tests in DBS procedures. The initial results indicate that the proposed method may be a clinically useful aid for optimal DBS lead placement as well as a new tool in the ongoing scientific search for the optimal DBS target for PD.

Published
2016
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46. Patient-specific electric field simulations and acceleration measurements for objective analysis of intraoperative stimulation tests in the thalamus

Author

Simone Hemm-Ode, Daniela Pison, Fabiola Alonso, Ashesh Shah, Jérôme Coste, Jean-Jacques Lemaire, Karin Wårdell, Institute for Medical and Analytical Technologies, School of Life Sciences (IMAT), University of Applied Sciences and Arts Northwestern Switzerland (HES-SO), Department of Biomedical Engineering (IMT), Linköping University (LIU), Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), This research was financially supported by the Swiss National Science Foundation (CR3212_153370), the Germaine de Staël program of the Swiss Academy of Engineering Sciences, the French Ministry of Health (2011-A00774-37), the Swedish Research Council (621-2013-6078) and the Parkinson Foundation at Linköping University., Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, and SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])

Subjects
Deep brain stimulation, intraoperative stimulation tests, medicine.medical_treatment, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Essential Tremor, 0206 medical engineering, Thalamus, Medical Engineering, Objective analysis, acceleration measurements, 02 engineering and technology, finite element method (FEM) simulations, behavioral disciplines and activities, patient-specific brain maps, lcsh:RC321-571, 03 medical and health sciences, Behavioral Neuroscience, Acceleration, 0302 clinical medicine, Acceleration measurements, Electric field, ventral intermediate nucleus (VIM), Medicine, deep brain stimulation (DBS), essential tremor, lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry, Biological Psychiatry, Medicinteknik, Original Research, Essential tremor, business.industry, Patient specific, medicine.disease, 020601 biomedical engineering, nervous system diseases, Psychiatry and Mental health, surgical procedures, operative, Neuropsychology and Physiological Psychology, nervous system, Neurology, Stimulation tests, business, therapeutics, Neuroscience, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 030217 neurology & neurosurgery, Ventral intermediate nucleus (VIM)
Abstract

International audience; Despite an increasing use of deep brain stimulation (DBS) the fundamental mechanisms of action remain largely unknown. Simulation of electric entities has previously been proposed for chronic DBS combined with subjective symptom evaluations, but not for intraoperative stimulation tests. The present paper introduces a method for an objective exploitation of intraoperative stimulation test data to identify the optimal implant position of the chronic DBS lead by relating the electric field (EF) simulations to the patient-specific anatomy and the clinical effects quantified by accelerometry. To illustrate the feasibility of this approach, it was applied to five patients with essential tremor bilaterally implanted in the ventral intermediate nucleus (VIM). The VIM and its neighborhood structures were preoperatively outlined in 3D on white matter attenuated inversion recovery MR images. Quantitative intraoperative clinical assessments were performed using accelerometry. EF simulations (n = 272) for intraoperative stimulation test data performed along two trajectories per side were setup using the finite element method for 143 stimulation test positions. The resulting EF isosurface of 0.2 V/mm was superimposed to the outlined anatomical structures. The percentage of volume of each structure's overlap was calculated and related to the corresponding clinical improvement. The proposed concept has been successfully applied to the five patients. For higher clinical improvements, not only the VIM but as well other neighboring structures were covered by the EF isosurfaces. The percentage of the volumes of the VIM, of the nucleus intermediate lateral of the thalamus and the prelemniscal radiations within the prerubral field of Forel increased for clinical improvements higher than 50% compared to improvements lower than 50%. The presented new concept allows a detailed and objective analysis of a high amount of intraoperative data to identify the optimal stimulation target. First results indicate agreement with published data hypothesizing that the stimulation of other structures than the VIM might be responsible for good clinical effects in essential tremor. (Clinical trial reference number: Ref: 2011-A00774-37/AU905)

Published
2016
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47. Human Foramen Magnum Area and Posterior Cranial Fossa Volume Growth in Relation to Cranial Base Synchondrosis Closure in the Course of Child Development

Author

Guillaume Coll, Federico Di Rocco, Jean-Jacques Lemaire, Laurent Sakka, Emmanuel de Schlichting, Isabelle Barthélémy, Jean-Marc Garcier, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, and SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])

Subjects
0301 basic medicine, Male, Adolescent, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, Population, Synchondrosis, Computed tomography, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, 03 medical and health sciences, 0302 clinical medicine, Child Development, Osteogenesis, medicine, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Humans, Foramen Magnum, education, Child, ComputingMilieux_MISCELLANEOUS, Retrospective Studies, Skull Base, Foramen magnum, education.field_of_study, Sex Characteristics, Base of skull, medicine.diagnostic_test, Ossification, business.industry, [SCCO.NEUR]Cognitive science/Neuroscience, Infant, Newborn, Infant, Anatomy, Cranial Sutures, 030104 developmental biology, medicine.anatomical_structure, Posterior cranial fossa, Cranial Fossa, Posterior, Volume growth, Child, Preschool, Surgery, Female, Neurology (clinical), medicine.symptom, business, Tomography, X-Ray Computed, 030217 neurology & neurosurgery
Abstract

BACKGROUND To date, no study has compared the evolution of the foramen magnum area (FMA) and the posterior cranial fossa volume (PCFV) with the degree of cranial base synchondrosis ossification. OBJECTIVE To illustrate these features in healthy children. METHODS The FMA, the PCFV, and the ossification of 12 synchondroses according to the Madeline and Elster scale were retrospectively analyzed in 235 healthy children using millimeter slices on a computed tomography scan. RESULTS The mean FMA of 6.49 cm in girls was significantly inferior to the FMA of 7.67 cm in boys (P < .001). In both sexes, the growth evolved in a 2-phase process, with a phase of rapid growth from birth to 3.75 years old (yo) followed by a phase of stabilization. In girls, the first phase was shorter (ending at 2.6 yo) than in boys (ending at 4.33 yo) and proceeded at a higher rate. PCFV was smaller in girls (P < .001) and displayed a biphasic pattern in the whole population, with a phase of rapid growth from birth to 3.58 yo followed by a phase of slow growth until 16 yo. In girls, the first phase was more active and shorter (ending at 2.67 yo) than in boys (ending at 4.5 yo). The posterior interoccipital synchondroses close first, followed by the anterior interoccipital and occipitomastoidal synchondroses, the lambdoid sutures simultaneously, then the petro-occipital and spheno-occipital synchondroses simultaneously. CONCLUSION The data provide a chronology of synchondrosis closure. We showed that FMA and PCFV are constitutionally smaller in girls at birth (P ≤ .02) and suggest that a sex-related difference in the FMA is related to earlier closure of anterior interoccipital synchondroses in girls (P = .01). ABBREVIATIONS AIOS, anterior interoccipital synchondrosesFMA, foramen magnum areaLS, lambdoid suturesOMS, occipitomastoidal synchondrosesPCFV, posterior cranial fossa volumePIOS, posterior interoccipital synchondrosesPOS, petro-occipital synchondrosesSOS, spheno-occipital synchondrosisyo, years old.

Published
2016
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48. Stimulation Cérébrale Profonde et Troubles Permanents de la Conscience – Etat de l’art

Author

Lemaire, Jean-Jacques, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, and SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SDV.MHEP.CHI]Life Sciences [q-bio]/Human health and pathology/Surgery, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

49. Recherche de corrélation entre connectivité cérébrale et troubles cognitifs chez des patients traumatisés encéphaliques à 3 mois post­traumatiques: méthode et résultats préliminaires

Author

Pontier, Bénédicte, De Schlichting, Emmanuel, Lemaire, Jean-Jacques, Germain-Mondon, Véronique, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], and CHU Clermont-Ferrand

Subjects
[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, [SCCO.NEUR]Cognitive science/Neuroscience, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

50. 3D Visualization of intraoperative stimulation test results for better target selection in DBS surgery

Author

Ashesh Shah, Fabiola Alonso, Jean-Jacques Lemaire, Karin Wårdell, Daniela Pison, Jérôme Coste, Erik Schkommodau, Simone Hemm-Ode, Institute for Medical and Analytical Technologies, School of Life Sciences (IMA), University of Applied Sciences and Arts Northwestern Switzerland (FHNW), Department of Biomedical Engineering (IMT), Linköping University (LIU), Service de Neurochirurgie [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand, Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Image Guided Clinical Neurosciences and Connectomics (IGCNC), Université d'Auvergne - Clermont-Ferrand I (UdA), Swiss, Austrian and German Societies of Biomedical Engineering, Service de Neurochirurgie [CHU Clermont-Ferrand], CHU Gabriel Montpied [Clermont-Ferrand], CHU Clermont-Ferrand-CHU Clermont-Ferrand, and SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)

Subjects
intraoperative stimulation, 3D visualization, Deep Brain Stimulation, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, [SDV.IB]Life Sciences [q-bio]/Bioengineering
Abstract

Poster; International audience; Despite an increasing use of deep brain stimulation (DBS), the fundamental mechanisms underlying therapeutic and adverse effects as well as the optimal stimulation site remain largely unknown. The aim of the present study was to develop a method to correlate electric field simulations for intraoperative stimulation tests with quantitatively evaluated symptom improvement and patient specific anatomy to estimate the optimal stimulation site. One essential tremor patient, bilaterally implanted in the ventro-intermediate nucleus (Vim) has been included. Preoperatively Vim and its anatomic neighbors were manually outlined according to spontaneous MRI contrasts using the commercial planning software from where the structures could be exported via a specifically designed interface. During the intervention, intraoperative stimulation tests were performed on two trajectories per hemisphere (8 positions per trajectory). The change in tremor at each stimulation position compared to baseline was evaluated using a 3-axis accelerometer. Based on accelerometer data, two stimulation amplitudes (low and high improvement) were identified per position and corresponding electric-field isosurfaces (0.2V/mm) were simulated. As each voxel in the region of interest may be part of several isosurfaces -each surface depicting one amplitude responsible for one improvement in tremor- the voxel was assigned to the isosurface representing the minimum improvement using Matlab. Data were imported into Paraview (VTK based 3D visualization software). Color-coded minimum 3D-improvement maps were visualized on the patient's MR images together with the manually outlined anatomical structures. The resulting visualization was evaluated by clinicians.The software allowed 3D visualization as well as orthographic slices parallel to the trajectory. Clinicians confirmed that it enables the identification of the most effective stimulation areas with respect to the anatomy. This new concept based on quantitative symptom evaluation, electric field simulations, and patient specific anatomical data will allow the analysis of a high amount of intraoperative data which might help to elucidate the mechanism of action of DBS.

Published
2016

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