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1. New modalities of cortical electrophysiology, perspectives in medical research and human physiology

Author

Bourdillon, Pierre and Evanson, Linnea

Subjects
Quantitative Biology - Neurons and Cognition, Electrical Engineering and Systems Science - Signal Processing
Abstract

Recent advances in material technology and in micro- and nano-electronics have profoundly changed the design of intracranial electrophysiology electrodes. It is now possible to manufacture electrodes that record cortical activity at a spatial resolution that was previously unthinkable. This high spatial resolution enables recording of the functional structures of the brain, and differentiation of the activity of the different types of neurons composing them. In this paper, we present a review of the different types of electrodes now available, and then suggest one of the first applications for such high resolution electrodes, namely a means to better characterise the mechanisms that generate focal seizures in epileptics. Finally, we reflect more broadly on prospects for their future use., Comment: Published in the Fyssen Annals 2021 in French and English. Article in French: pages 1-7. Article in English: pages 7-13

Published
2024

5. Case report: Simultaneous measurement of intracranial pressure and lumbar intrathecal pressure during epidural patch therapy for treating spontaneous intracranial hypotension syndrome. Spontaneous intracranial hypotension or spontaneous intraspinal hypovolume?

Author

Engrand, Nicolas, Salardaine, Quentin, Desilles, Jean-Philippe, Echard, Cécile, Bourdillon, Pierre, Williams, Marc, and Baille, Guillaume

Subjects
INTRACRANIAL pressure, HYPOTENSION, PRESSURE measurement, INTRA-abdominal hypertension, SUBDURAL hematoma, SYNDROMES
Abstract

Objectives: Spontaneous intracranial hypotension (SIH) is frequently complicated by subacute subdural hematoma (SDH) and more rarely by bilateral thalamic ischemia. Here, we report a case of SIH-related SDH treated with three epidural patches (EPs), with follow-up of the intracranial pressure and lumbar intrathecal pressure. Methods: A 46-year-old man presented bilateral thalamic ischemia, then a growing SDH. After failure of urgent surgical evacuation, he underwent three saline EPs, two dynamic myelography examinations and one digital subtraction angiography-phlebography examination. However, because of no dural tear and no obstacle to the venous drainage of the vein of Galen, no therapeutic procedure was available, and the patient died. Results: The case exhibited a progressive increase in the transmission of lumbar intrathecal pressure to intracranial pressure during the three EPs. The EPs may have successfully treated the SIH, but the patient did not recover consciousness because of irreversible damage to both thalami. Conclusion: Clinicians should be aware of the bilateral thalamic ischemia picture that may be the presenting sign of SIH. Moreover, the key problem in the pathophysiology of SIH seems to be intraspinal and intracranial volumes rather than pressures. Therefore, intracranial hypotension syndrome might actually be an intraspinal hypovolume syndrome. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Preservation of frontal white matter tracts in ventricular surgery: favoring an anterior interhemispheric transcallosal approach vs a transcortical transfrontal transventricular approach

Author

Massachusetts Institute of Technology. Research Laboratory of Electronics, El-Bendary, Yehia, Apra, Caroline, Aldea, Sorin, Chauvet, Dorian, Dorfmüller, Georg, Ferrand-Sorbets, Sarah, Lecler, Augustin, Le Guérinel, Caroline, Bourdillon, Pierre, Massachusetts Institute of Technology. Research Laboratory of Electronics, El-Bendary, Yehia, Apra, Caroline, Aldea, Sorin, Chauvet, Dorian, Dorfmüller, Georg, Ferrand-Sorbets, Sarah, Lecler, Augustin, Le Guérinel, Caroline, and Bourdillon, Pierre

Abstract

Secondary to the creation of a surgical corridor and retraction, white matter tracts degenerate, causing long-term scarring with potential neurological consequences. Third and lateral ventricle tumors require surgery that may lead to cognitive impairment. Our objective is to compare the long-term consequences of a transcortical transfrontal approach and an interhemispheric transcallosal approach on corpus callosum and frontal white matter tracts degeneration. Surgical patients with ventricular tumor accessible through both approaches were included and clinico-radiological data were retrospectively analyzed. The primary endpoint was the callosotomy length at 3-month post-operative T1 MRI, corrected by the extension of the tumor and the use of neuronavigation. Secondary outcomes included perioperative criteria such as bleeding, use of retractors and duration, FLAIR hypersignal on 3-month MRI, and re-do surgeries. To assess white matter tract interruption, 3-month FLAIR hypersignal was superposed to a tractography atlas. Seventy patients were included, 57 (81%) in the transfrontal group and 13 (19%) in the interhemispheric group. There was no difference in the mean callosotomy length on 3-month MRI (12.3 mm ± 5.60 transfrontal vs 11.7 mm ± 3.92 interhemispheric, p = 0.79) on univariate and multivariate analyses. The callosotomy length was inferior by − 3.13 mm for tumors located exclusively in the third ventricle (p = 0.016), independent of the approach. Retractors were used more often in transfrontal approaches (60% vs 33%, p < 0.001). The extent of frontal FLAIR hypersignal was higher after transfrontal approach (14.1 mm vs 0.525 mm, p < 0.001), correlated to the use of retractors (p < 0.05). After the interhemispheric approach, no tract other than corpus callosum was interrupted, whereas, after the transfrontal approach, frontal arcuate fibers and projections from the thalamus were interrupted in all patients, the cingulum in 19 (33%), the superior fronto

Published
2022

18. Global Perspectives on Task Shifting and Task Sharing in Neurosurgery

Author

Robertson, Faith C., primary, Esene, Ignatius N., additional, Kolias, Angelos G., additional, Khan, Tariq, additional, Rosseau, Gail, additional, Gormley, William B., additional, Park, Kee B., additional, Broekman, Marike L.D., additional, Rosenfeld, Jeffrey, additional, Balak, Naci, additional, Ammar, Ahmed, additional, Tisel, Magnus, additional, Haglund, Michael, additional, Smith, Timothy, additional, Mendez, Ivar, additional, Brennum, Jannick, additional, Honeybul, Stephen, additional, Matsumara, Akira, additional, Muneza, Severien, additional, Rubiano, Andres, additional, Kamalo, Patrick, additional, Fieggen, Graham, additional, Misra, Basant, additional, Bolles, Gene, additional, Adelson, David, additional, Dempsey, Robert, additional, Hutchinson, Peter, additional, Nikova, Alexandrina, additional, Ghazala, Osama, additional, Buno, Elubabor, additional, Bhattacharjee, Shibashish, additional, Iizuka, Takahiro, additional, Abdullah, Jafri Malin, additional, Chaurasia, Bipin, additional, Morgan, Eghosa, additional, Alcedo-Guardia, Rodolfo E., additional, Lucena, Lynne Lourdes N., additional, Oktay, Kadir, additional, AbdAllah, Omar Ibrahim, additional, Saihi, Ahlem, additional, Abdeldjalil, Gacem, additional, Asmaa, Mahi, additional, Yampolsky, Claudio, additional, Saladino, Laura P., additional, Mannara, Francisco, additional, Sachdev, Sonal, additional, Price, Benjamin, additional, Joris, Vincent, additional, Adeniran Bankole, Nourou Dine, additional, Carrasco, Edgar M., additional, Hodzic, Mirsad, additional, de Sousa Porto, Marcos Wagner, additional, Amorim, Robson, additional, Maldonado, Igor Lima, additional, Yves, Bizoza, additional, Suarez, Gonzalo, additional, Constanzo, Felipe, additional, Valdeblanquez Atencio, Johanna Cecilia, additional, Ruiz Mora, Karen Alexa, additional, Rodriguez Gil, Juan Manuel, additional, Paraskeva, Kiriakos, additional, Egemen, Emrah, additional, Ngamasata, Trevcsor, additional, Ntalaja, Jeff, additional, Beltchika, Antoine, additional, Ntsambi, Glennie, additional, Dunia, Goertz Mirenge, additional, Taha, Mahmoud M., additional, Arnaout, Mohamed, additional, Kirollos, Ramez, additional, Kassem, Mohamed, additional, Elwardany, Omar, additional, Negida, Ahmed, additional, Dolango, Birhanu, additional, Aseged, Mikael, additional, Mldie, Alemu Adise, additional, Laeke, Tsegazeab, additional, Aklilu, Abenezer, additional, Adefris, Esayas, additional, Luoto, Teemu, additional, Behnam, Rezai Jahromi, additional, De Schlichting, Emmanuel, additional, Nassim, Bougaci, additional, Bourdillon, Pierre, additional, Stienen, Martin N., additional, Lackermair, Stephan, additional, Schmidt, Franziska Anna, additional, Konczalla, Juergen, additional, Holzgreve, Adrien, additional, Sagerer, Andre, additional, Weinert, Dieter M., additional, Kumi, Paulette, additional, McLean, Aaron Lawson, additional, Loan, James, additional, Cahill, Julian, additional, Dockrell, Simon, additional, Afshari, Fardad T., additional, May, Paul, additional, Athanasiou, Alkinoos, additional, Papadopoulos, Steven, additional, Espinoza, Edroulfo-Georgios, additional, Chatzisotiriou, Athanasios, additional, Vlachogiannis, Pavlos, additional, Karabatsou, Konstantina, additional, Paschalis, Thanasis, additional, Tsitsipanis, Christos, additional, Longo Calderan, Gabriel Mauricio, additional, Leiva, Ronny, additional, Deora, Harsh, additional, Mukkamala, Sreenivas, additional, Batra, Dipesh, additional, Sukumaran, Arvind, additional, Parmar, Kanishk, additional, Bahl, Anuj, additional, Agrawal, Amit, additional, Dev, Nirankar, additional, Thakur, Nikhil, additional, Behari, Sanjay, additional, Yandrapati, Chandrasekhar B.V.K., additional, Bhoot, Ritesh, additional, Bhatt, Pragnesh, additional, Bhaumik, Uday, additional, Agrawal, Manish, additional, Thomas, Antony, additional, Chandrappa, Harish, additional, Mathur, Ankit, additional, Wahjoepramono, Petra, additional, Oswari, Selfy, additional, Al-Mahfoudh, Rafid, additional, Alnaji, Abbas, additional, Abuhadrous, Nidal, additional, Jarad, Bakr Abo, additional, Nour, Ibrahim, additional, Cohen-Inbar, Or, additional, Colasanti, Roberto, additional, Conti, Alfredo, additional, Raffa, Giovanni, additional, Castrioto, Corrado, additional, Baccanelli, Matteo M., additional, Tomasi, Santino Ottavio, additional, Zoli, Matteo, additional, Veroni, Andrea, additional, Di Cristofori, Andrea, additional, Giannachi, Luigi, additional, Lippa, Laura, additional, Sgubin, Donatella, additional, Broggi, Morgan, additional, Barbato, Marcello, additional, Restelli, Francesco, additional, Ganau, Mario, additional, Taddei, Graziano, additional, Albadawi, Hamzeh, additional, Salameh, Mohammed, additional, Gulmira, Madieyva, additional, Lashhab, Muffaq, additional, El Gaddafi, Walid, additional, Altoumi, Mohammad, additional, Manvinder, S.M., additional, Kanesen, Davendran, additional, Teo, Mario, additional, Sriram, Prabu Rau, additional, Zamri, Sarah Atiqah M., additional, Vinodh, Vayara Perumall, additional, Denou, Moussa, additional, Melhaoui, Adyl, additional, Outani, Oumaima, additional, Boutarbouch, Mahjouba, additional, Gretschel, Armin, additional, Yadav, Pradhumna, additional, Karmacharya, Balgopal, additional, Incekara, Fatih, additional, Boogert, Hugo den, additional, Lopez, Buccket Argvoello, additional, Amadou, Hassane Ali, additional, Sale, Danjuma, additional, Bello, Sanusi, additional, Edward, Poluyi, additional, Ukachukwu, Alvan-Emeka, additional, Nwaribe, Evaristus, additional, Aniaku, Ikechukwu, additional, Ndajiwo, Aliyu Baba, additional, Ayodele, Olabamidele, additional, Bot, Gyang Markus, additional, Ndubuisu Achebe, Sunday David, additional, Jamal, Bakht, additional, Tariq, Muhammad, additional, Farooq, Ghulam, additional, Khan, Danyal Zaman, additional, Khizar, Ahtesham, additional, Hussain, Zahid, additional, Nazir, Anisa, additional, Gonzales-Portillo, Marco, additional, Bautista, Jhosep Silvestre, additional, Torres, Roland A., additional, Javier-Lizan, Abigail, additional, de los Santos, Isagani Jodl G., additional, Morais, Nuno, additional, Dias, Lydia, additional, Noronha, Carolina, additional, Silva, Jovelo Monteiro, additional, Seromenho-Santos, Alexandra, additional, Lozanche, Kiril, additional, Negoi, Ionut, additional, Tascu, Alexandru, additional, Kozyrev, Danil A., additional, Nkeshimana, Menelas, additional, Karekezi, Claire, additional, Ndayishyigikiye, Marcel Didier, additional, Alabbass, Faisal, additional, Farrash, Faisal, additional, Alhazmi, Rawan, additional, Golubovic, Jagos, additional, Lepifá, Milan, additional, Ilifá, Rosanda, additional, Stanimirovifá, Aleksandar, additional, Garcia-Garcia, Sergio, additional, Rodriguez Arias, Carlos A., additional, Lau, Ruth, additional, Delgado-Fernandez, Juan, additional, Arraez, Miguel A., additional, Mateos, C. Fernandez, additional, Castano Leon, Ana M., additional, Wadanamby, Saman, additional, Bervini, David, additional, Shabani, Hamisi K., additional, Limpastan, Kriengsak, additional, Ayadi, Khalil, additional, Sencer, Altay, additional, Yalcinkaya, Ali, additional, Eren, Elif, additional, Basaran, Recep, additional, Gokoglu, Abdulkerim, additional, Mykola, Vyval, additional, Tayong, Felicita, additional, Zuccarello, Mario, additional, Quinsey, Carolyn, additional, Dewan, Michael C., additional, Young, Paul H., additional, Laws, Edward, additional, Rock, Jack, additional, Kurland, David B., additional, Muh, Carrie R., additional, Delgado Aguilar, Eri Dario, additional, Burns, Kenneth, additional, Low, Jacob, additional, Keogh, Conor, additional, Uff, Chris, additional, Spina, Alfio, additional, and Alelyani, Fayez, additional

Published
2020
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20. Second World War: Paris neurosurgeon's map outwitted Nazis

Author

Bourdillon, Pierre, Lévêque, Marc, Apra, Caroline, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, Sorbonne Université - Faculté de Médecine (SU FM), and Sorbonne Université (SU)

Subjects
[SHS.HIST]Humanities and Social Sciences/History, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

23. Restoring consciousness with vagus nerve stimulation

Author

Corazzol, Martina, primary, Lio, Guillaume, additional, Lefevre, Arthur, additional, Deiana, Gianluca, additional, Tell, Laurence, additional, André-Obadia, Nathalie, additional, Bourdillon, Pierre, additional, Guenot, Marc, additional, Desmurget, Michel, additional, Luauté, Jacques, additional, and Sirigu, Angela, additional

Published
2017
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26. Extended Endoscopic Endonasal Approach for a Giant Parasellar Epidermoid Cyst.

Author

Aldea, Sorin, Veyrat, Mathieu, Bourdillon, Pierre, Ayache, Denis, and Le Guérinel, Caroline

Subjects
EPIDERMAL cyst, PTERYGOID muscles, MAGNETIC resonance imaging, CAVERNOUS sinus
Abstract

Epidermoid cysts are rare lesions which typically grow slowly. For this reason, these lesions are usually discovered when they are already very large. The parasellar location is no exception to this rule and may involve the cavernous sinus or the Meckel cave. We present a 34-year-old female patient without past medical history who was admitted in our tertiary referral center for episodes of diplopia in the right lateral gaze and right trigeminal dysesthesias. Brain magnetic resonance imaging (MRI) showed a large right parasellar mass with mixed intensity signal on the T1 and T2 sequences, without contrast enhancement and a typical hypersignal intensity on diffusion-weighted sequences evoking an epidermoid cyst. We discuss the radiologic criteria which differentiate the lesions originating in the cavernous sinus from those of the Meckel cave (Figs. 1 and 2). Parasellar tumors may be approached through classical transcranial approaches such the epidural temporopolar or the subtemporal approach which involve a significant degree of brain retraction. The last decade witnessed the advent of extended endonasal approaches which offer an interesting alternative and avoid the manipulation of the brain. We used the endoscopic transpterygoid approach in our patient and we were able to achieve an excellent clinical and radiological result. We discuss the nuances of the technique and present the surgical steps of the procedure (Figs. 3 and 4). The endoscopic endonasal approach represents an excellent therapeutic option for parasellar lesions. A thorough knowledge of the anatomy and experience with endoscopic techniques are obvious prerequisite. The link to the video can be found at: https://youtu.be/QonSvHrCwOU. [ABSTRACT FROM AUTHOR]

Published
2022
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27. Toward the optimal surgical treatment of hypothalamic hamartoma.

Author

Bourdillon, Pierre, Ferrand‐Sorbets, Sarah, Goetz, Laurent, and Dorfmüller, Georg

Subjects
*HAMARTOMA, *PROGNOSIS, *FUNCTIONAL magnetic resonance imaging, *STEREOTAXIC techniques
Abstract

To the Editors: We read with great interest the study reported by Shirozu et al. concerning semimicrorecordings during stereotactic thermocoagulation of hypothalamic hamartoma (HH).1 The surgical treatment of HH has been the subject of many innovations in recent years, with the introduction of laser coagulation2 and endoscopic3 or stereotaxic thermocoagulation.4 Initial data suggested a lower complication rate, with equal efficacy, in multiple-radiofrequency thermocoagulations and laser coagulations, through either stereotactic or robot-guided endoscopy, compared to laser interstitial therapy (LiTT).5 However, the introduction of resting state functional magnetic resonance imaging (rsfMRI) targeting of the HH region has reduced the complications reported with LiTT.6 The study published by Shirozu et al. is the first to report microrecordings achieving targeting1 within the hamartoma on the same principle as rsfMRI. A single intraventricular working channel therefore allows the placement of the microrecording electrode and then a laser fiber or thermocoagulation probe, in multiple locations, theoretically lowering the risks and allowing direct control, in real time, of the coagulations. Subcentimeter epilepsy surgery targets by resting state functional magnetic resonance imaging can improve outcomes in hypothalamic hamartoma. [Extracted from the article]

Published
2021
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28. Intraoperative Ultrasound Shear-Wave Elastography in Focal Cortical Dysplasia Surgery.

Author

Mathon, Bertrand, Clemenceau, Stéphane, Carpentier, Alexandre, and Bourdillon, Pierre

Subjects
MAGNETIC resonance imaging, ULTRASONIC imaging, FOCAL cortical dysplasia, TEMPORAL lobectomy, ELASTOGRAPHY, EPILEPSY surgery
Abstract

Previous studies reported interest in intraoperative shear-wave elastography (SWE) guidance for brain-tumor and epilepsy surgeries. Focal cortical dysplasia (FCD) surgery is one of the most appropriate indications for using SWE guidance. The aim of this study was to evaluate the efficacy of ultrasound SWE techniques for the intraoperative detection of FCDs. We retrospectively analyzed data from 18 adult patients with drug-resistant epilepsy associated with FCD who had undergone SWE-guided surgery. Conventional B-mode images detected FCD in 2 patients (11.1%), while SWE detected FCD in 14 patients (77.8%). The stiffness ratios between MRI-positive and -negative cases were significantly different (3.6 ± 0.4 vs. 2.2 ± 0.6, respectively; p < 0.001). FCDs were significantly more frequently detected by interoperative SWE in women (OR 4.7, 95% CI (1.7–12.7); p = 0.004) and in patients in whom FCD was visible on magnetic resonance imaging (MRI; OR 2.3, 95% CI (1.3–4.3); p = 0.04). At 1 year after surgery and at last follow-up (mean = 21 months), seizure outcome was good (International League Against Epilepsy (ILAE) Class 1 or 2) in 72.2% and 55.6% of patients, respectively. Despite some limitations, our study highlighted the potential of SWE as an intraoperative tool to detect FCD. Future technical developments should allow for optimizing intraoperative surgical-cavity evaluation from the perspective of complete FCD resection. Interobserver reliability of SWE measurements should also be assessed by further studies. [ABSTRACT FROM AUTHOR]

Published
2021
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30. Stereoelectroencephalography-guided radiofrequency thermocoagulation.

Author

Dannhoff G, Fumagalli L, Ferrand-Sorbets S, Dorfmuller G, Quirins M, and Bourdillon P

Abstract

Within the neurosurgeon's armamentarium, stereoelectroencephalography (SEEG)-guided radiofrequency thermocoagulation (RFTC) is an elegant tool to manage epilepsy in selected cases. This technique can 1) be curative when targeting small-volume ictal onset zones, 2) be used as a diagnostic tool by observing the consequences of coagulation on seizures or by recording the epileptic network in SEEG, and 3) offer palliative treatment through multiple lesions within a wide epileptic network. It is performed on awake patients, under continuous neurological evaluation, while monitoring impedance, time, and energy delivered. It could offer highly favorable outcomes in some cases, as in periventricular nodular heterotopia where 81% of patients are responders., Competing Interests: Disclosures The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this publication.The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this publication., (© 2024, The Authors.)

Published
2024
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