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8 results on '"Derambure, P."'

1. Functional connectivity disruptions correlate with cognitive phenotypes in Parkinson's disease

Author

Hassan, M., Chaton, L., Benquet, P., Delval, A., Leroy, C., Plomhause, L., Moonen, A.J.H., Duits, A.A., Leentjens, A.F.G., van Kranen-Mastenbroek, V., Defebvre, L., Derambure, P., Wendling, F., Dujardin, K., RS: MHeNs - R1 - Cognitive Neuropsychiatry and Clinical Neuroscience, Psychiatrie & Neuropsychologie, MUMC+: MA Med Staf Spec Psychiatrie (9), MUMC+: HZC Med Staf Spec Klinische Neurofys (9), Laboratoire Traitement du Signal et de l'Image (LTSI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Troubles cognitifs vasculaires et dégénératifs, Université de Lille, Sciences et Technologies, Michael J. Fox Foundation for Parkinson's Research, ANR-10-LABX-07-01, Agence Nationale de la Recherche, and Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Male, CORTICAL NETWORKS, Parkinson's disease, Statistics as Topic, Neuropsychological Tests, lcsh:Computer applications to medicine. Medical informatics, lcsh:RC346-429, QUANTITATIVE EEG, Network measures, Neural Pathways, Humans, Brain connectivity, RATING-SCALE, SMALL-WORLD, lcsh:Neurology. Diseases of the nervous system, Aged, Analysis of Variance, Brain Mapping, MEG, Spectrum Analysis, Cognitive deficits, [SDV.NEU.SC]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Cognitive Sciences, Brain, Electroencephalography, Parkinson Disease, Regular Article, FRONTOTEMPORAL DEMENTIA, Middle Aged, LEWY BODIES, ALZHEIMERS-DISEASE, BRAIN NETWORKS, Cross-Sectional Studies, GRAPH-THEORETICAL ANALYSIS, Disease Progression, lcsh:R858-859.7, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Female, Cognition Disorders, Dense electroencephalography, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

Cognitive deficits in Parkinson's disease are thought to be related to altered functional brain connectivity. To date, cognitive-related changes in Parkinson's disease have never been explored with dense-EEG with the aim of establishing a relationship between the degree of cognitive impairment, on the one hand, and alterations in the functional connectivity of brain networks, on the other hand. This study was aimed at identifying altered brain networks associated with cognitive phenotypes in Parkinson's disease using dense-EEG data recorded during rest with eyes closed. Three groups of Parkinson's disease patients (N = 124) with different cognitive phenotypes coming from a data-driven cluster analysis, were studied: G1) cognitively intact patients (63), G2) patients with mild cognitive deficits (46) and G3) patients with severe cognitive deficits (15). Functional brain networks were identified using a dense-EEG source connectivity method. Pairwise functional connectivity was computed for 68 brain regions in different EEG frequency bands. Network statistics were assessed at both global (network topology) and local (inter-regional connections) level. Results revealed progressive disruptions in functional connectivity between the three patient groups, typically in the alpha band. Differences between G1 and G2 (p, Highlights • We test the use of dense-EEG to identify altered brain networks associated with cognitive phenotypes in Parkinson's disease. • The functional connectivity decreases with the worsening of cognitive performance • The loss of frontotemporal connectivity may be a promising neuromarker of cognitive impairment in Parkinson's disease.

Published
2016

4. Epilepsies and time to diagnosis

Author

Cachera, C., Baulac, M., Fagnani, F., Jallon, P., Leveau, J., Loiseau, P., Motte, J., Thomas, P., Vallee, L., Allaire, C., Autret, A., Baldy-Moulinier, M., Clanet, M., Dordain, G., Gastaut, J. L., Giroud, M., Josien, E., Marescaux, C., Masnou, P., Mauguiere, F., Parain, D., Perret, J., Revol, M., Rumbach, L., Tapie, P., Weber, M., Adam, C., Attal, N., Attane, F., Aubrun, P., Ayrivie, N., Badinand-Hubert, N., Bapst-Reiter, J., Barthez-Carpentier, M. A., Bartolomei, F., Bataillard, M., Bednarek, N., Belair, C., Benazet, M., Berges, S., Bergouignan, F. X., Bernard, C., Bernard-Bourzeix, L., Bertran, F., Bertrand, P., Beuriat, P., Billard, C., Bille-Turc, F., Billy, C., Biraben, A., Blanc, A., Boidein, F., Bouayed, N., Boudon, S., Bouillat, J., Boulloche, J., Bredin, A., Brocard, O., Brosset, P., Brunet-Bourgin, F., Cenraud, B., Chaigne, D., Chaix, Y., Chaunu, M. P., Chavot, D., Clavelou, P., Cohadon, S., Collombier, N., Contis, P. E., Convers, P., Couchot, J., Cournelle, M. A., Courtois, S., Croguennec, J. M., Cuisset, J. M., Cuvellier, J. C., D Anglejan, J., Damon, G., Danielli, A., Daubney, P., Bellescize, J., Lumley, L., Recondo, A., Swarte, M., Deffond, D., Delangre, T., Delisse, B., Derambure, P., Derambure, S., Desbordes, P., Desfrancois, F., Destee-Warot, M., Dien, J., Doremus, B., Dourneau-Lethiecq, M. C., Dubois, F., Duche, B., Ducrocq, X., Duhurt, J., Duprey, J., Durand, G., Dusser, A., Escaillas, J. P., Fanjaud, G., Felten, D., Fischer, C., Fontan, D., Formosa, F., Foulon, E., Furby, A., Gallet, S., Galmiche, J., Garde-Arthaud, P., Garrel, S., Gaultier, C., Gauthier, C., Gauthier-Morel, D., Genton, P., Geraud, G., Girard, J. P., Girard-Madoux, M., Gonnaud, P., Goulon-Goeau, C., Gros, S., Grosclaude, M., Gross, M., Gueguen, B., Guinot, H., Haenggeli, C. A., Hamon, J. B., Henlin, J. L., Hevin, B., Hinault, P., Homeyer, P., Hommet, C., Huart, E., Huc, P., Huttin, B., Inglesiakis, L., Isnard, J., Isnard, H., Jogeix, M., Juhel, C., Kahane, P., Kalafat, M., Keo-Kosal, P., Kreib, A. M., Kubler, C., Larrieu, E., Larrieu, J. L., Latinville, D., Le Gallou-Wittenberg, A., Lebas, F., Lebrun-Grandie, P., Leche, J., Legout, A., Legrand, S., Legroux, M., Lemaitre, J. F., Lestavel, P., Levasseur, M., Lienhard, C., Livet, M. O., Louiset, P., Lubeau, M., Lucas, B., Lucas-Daviaud, J., Maillard, S., Maillet-Vioud, M., Mancini, J., Mann, M., Marchal, C., Martini, L., Maupetit, J., Maynard, R., Menage, P., Menard, D., Metreau, R., Milor, M., Minot-Myhie, M. C., Moene, Y., Montagne, B., Montelescaut, M. E., Moreaud, O., Noelle, B., Olmi, X., Orbegozo, J., Ouvrard-Hernandez, A. M., Parsa, A., Pautrizel, B., Pedespan, J. M., Pernes, P., Perrouty, B., Petit, J., Peudenier, S., Picard, A. M., Pierrot-Deseilligny, C., Planque, E., Portha, C., Preux, P. M., Prud Homme, M., Raybaut-Guilhem, D., Rebaud, P., Regi, A., Regi, J. L., Reis, J., Rejou, F., Remy, C., Renard, J. F., Revenu, M., Revol, A., Rey, M., Richelme, C., Ricou, P., Rigal, J. P., Rogez, R., Rousselle, C., Rummens, C., Philippe Ryvlin, Sabouraud, P., Saikali, I., Saudeau, D., Savet, J. F., Schaeffer, J. L., Schaff, J. L., Schoenfelder, F., Schuermans, P., Senant, J., Setiey, A., Sevrin, C., Sivelle, G., Soisson, T., Soubielle, P., Soulages, X., Soulayrol, S., Tabaraud, F., Taillandier, P., Tannier, C., Tarel, V., Taussig, D., Thedrez, F., Tournier, C. L., Turc, J. D., Vanhulle, C., Vaunaize, J., Verier, A., Vernay, D., Visy, J. M., Vongsouthi, C., Vrigneaud, J., Waubant, E., Weichlein, A., Weill, O., Zai, L., Ziegler, F., Zix, C., Zelicourt, M., and Grp, Carole

7. Event-related variations in the activity of EEG-rhythms. Application to the physiology and the pathology of movements

Author

William Szurhaj, Labyt E, Jl, Bourriez, Cassim F, Defebvre L, Jj, Hauser, Jd, Guieu, and Derambure P

Abstract

The averaging of the ongoing activity of the electroencephalogram (EEG) allows extracting the potentials that are time-locked and phase-locked to an event. These potentials are described as evoked potentials. There is another type of change in the ongoing EEG, which is time-locked but not phase-locked to an event: the EEG rhythm reactivity, also called "Event-Related Desynchronization and Synchronization" (ERD/ERS) by Pfurtscheller. These changes are often visible to the naked eye but they cannot be extracted by the averaging technique. Their quantification requires another method, which was suggested by Pfurtscheller and Aranibar in 1977. This method consists in measuring the temporal evolution of the power of EEG signal within a given frequency band before, during, and after an event. ERD corresponds to the decrease in power of an EEG rhythm related to an event. Conversely, ERS corresponds to an increase in amplitude of an EEG rhythm related to the event. ERD represents the activation of the subjacent cortical areas. ERS would partly traduce the setting at rest of the cortex; it would also be related to the somesthetics afferents inputs. This method can be applied to the study of cortical activation in many situations: memory tasks, auditory processing, attention, anticipatory behavior, and voluntary movement. Thus, a voluntary self-paced movement of the dominant hand is preceded by an ERD of mu and beta rhythms occurring respectively 2 000 and 1 500 ms before the movement onset. This ERD is recorded over the contralateral central region. It becomes bilateral at the movement onset and reaches its maximum at the movement offset. It is then followed by an ERS of the beta rhythms. We show that ERD/ERS phenomena vary with the type of movement, and that their study allows exploring the modifications of cortical excitability that are observed in Parkinson's disease and in epilepsy with focal motor seizures.

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