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Trauffler A, De Jonckheere J, Lamblin MD, Nguyen S, Derambure P, Logier R, Szurhaj W. Évaluation de l’intérêt de l’enregistrement continue de la variabilité du rythme cardiaque comme outil de détection des crises d’épilepsie chez 30 enfants hospitalisés. Neurophysiol Clin 2017. [DOI: 10.1016/j.neucli.2017.05.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Hennion S, Delbeuck X, Koelkebeck K, Brion M, Tyvaert L, Plomhause L, Derambure P, Lopes R, Szurhaj W. A functional magnetic resonance imaging investigation of theory of mind impairments in patients with temporal lobe epilepsy. Neuropsychologia 2016; 93:271-279. [DOI: 10.1016/j.neuropsychologia.2016.11.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 11/04/2016] [Accepted: 11/08/2016] [Indexed: 10/20/2022]
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Aubert S, Bonini F, Curot J, Valton L, Szurhaj W, Derambure P, Rheims S, Ryvlin P, Wendling F, McGonigal A, Trébuchon A, Bartolomei F. The role of sub-hippocampal versus hippocampal regions in bitemporal lobe epilepsies. Clin Neurophysiol 2016; 127:2992-2999. [DOI: 10.1016/j.clinph.2016.06.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/18/2016] [Accepted: 06/21/2016] [Indexed: 11/27/2022]
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Lamblin MD, Szurhaj W, Chochoi M, Delval A, Derambure P. Monitorage EEG continu en réanimation. Neurophysiol Clin 2016. [DOI: 10.1016/j.neucli.2016.06.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Louvet É, Bertran F, Boudet S, Derambure P, Reyns N, Szurhaj W. Enregistrement intracérébral des pointes épileptiques généralisées et leur impact sur l’hippocampe. Neurophysiol Clin 2016. [DOI: 10.1016/j.neucli.2016.06.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Chipaux M, Szurhaj W, Vercueil L, Milh M, Villeneuve N, Cances C, Auvin S, Chassagnon S, Napuri S, Allaire C, Derambure P, Marchal C, Caubel I, Ricard-Mousnier B, N'Guyen the Tich S, Pinard JM, Bahi-Buisson N, de Baracé C, Kahane P, Gautier A, Hamelin S, Coste-Zeitoun D, Rosenberg SD, Clerson P, Nabbout R, Kuchenbuch M, Picot MC, Kaminska A. Epilepsy diagnostic and treatment needs identified with a collaborative database involving tertiary centers in France. Epilepsia 2016; 57:757-69. [DOI: 10.1111/epi.13368] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2016] [Indexed: 01/17/2023]
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Szurhaj W, Troussière AC, Logier R, Derambure P, Tyvaert L, Semah F, Ryvlin P, De Jonckheere J. Ictal changes in parasympathetic tone: Prediction of postictal oxygen desaturation. Neurology 2015; 85:1233-9. [PMID: 26341872 DOI: 10.1212/wnl.0000000000001994] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 06/15/2015] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To measure changes in parasympathetic tone before, during, and after temporal seizures, and to determine whether changes in high-frequency heart rate variability are correlated with postictal oxygen desaturation. METHODS We recorded the electrocardiogram and peripheral oxygen saturation during 55 temporal lobe seizures and calculated a high-frequency variability index (HFVI) as a marker of parasympathetic tone for periods of 20 minutes (centered on seizure onset). We then compared HFVI values in seizures with and without postictal hypoxemia, and looked for correlations between HFVI changes and the risk of sudden unexpected death in epilepsy (SUDEP) (as assessed with the SUDEP-7 Inventory). RESULTS Parasympathetic tone decreased rapidly at the onset of temporal lobe seizures, reached its minimum value at the end of the seizure, and then gradually returned to its preictal value. Changes in parasympathetic tone were more intense and longer-lasting in older patients with a longer duration of epilepsy. The HFVI was significantly lower during seizures with hypoxemia, and remained significantly lower 5 minutes after the end of the seizure. The change in the HFVI slope over the first 30 seconds of the seizure was predictive of postictal oxygen desaturation. Postictal autonomic changes were correlated with the SUDEP-7 scores. CONCLUSION Our results showed that ictal autonomic dysfunction is correlated with postictal hypoxemia. A prolonged impairment of parasympathetic tone might expose a patient to a greater risk of postictal sudden unexpected death. The real-time measurement of parasympathetic tone in patients with epilepsy may be of value to medical staff as an early warning system.
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Alexandre V, Mercedes B, Valton L, Maillard L, Bartolomei F, Szurhaj W, Hirsch E, Marchal C, Chassoux F, Petit J, Crespel A, Nica A, Navarro V, Kahane P, De Toffol B, Thomas P, Rosenberg S, Denuelle M, Jonas J, Ryvlin P, Rheims S. Risk factors of postictal generalized EEG suppression in generalized convulsive seizures. Neurology 2015; 85:1598-603. [PMID: 26333799 DOI: 10.1212/wnl.0000000000001949] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 06/12/2015] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To identify the clinical determinants of occurrence of postictal generalized EEG suppression (PGES) after generalized convulsive seizures (GCS). METHODS We reviewed the video-EEG recordings of 417 patients included in the REPO2MSE study, a multicenter prospective cohort study of patients with drug-resistant focal epilepsy. According to ictal semiology, we classified GCS into 3 types: tonic-clonic GCS with bilateral and symmetric tonic arm extension (type 1), clonic GCS without tonic arm extension or flexion (type 2), and GCS with unilateral or asymmetric tonic arm extension or flexion (type 3). Association between PGES and person-specific or seizure-specific variables was analyzed after correction for individual effects and the varying number of seizures. RESULTS A total of 99 GCS in 69 patients were included. Occurrence of PGES was independently associated with GCS type (p < 0.001) and lack of early administration of oxygen (p < 0.001). Odds ratio (OR) for GCS type 1 in comparison with GCS type 2 was 66.0 (95% confidence interval [CI 5.4-801.6]). In GCS type 1, risk of PGES was significantly increased when the seizure occurred during sleep (OR 5.0, 95% CI 1.2-20.9) and when oxygen was not administered early (OR 13.4, 95% CI 3.2-55.9). CONCLUSION The risk of PGES dramatically varied as a function of GCS semiologic characteristics. Whatever the type of GCS, occurrence of PGES was prevented by early administration of oxygen.
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Hennion S, Szurhaj W, Duhamel A, Lopes R, Tyvaert L, Derambure P, Delbeuck X. Characterization and prediction of the recognition of emotional faces and emotional bursts in temporal lobe epilepsy. J Clin Exp Neuropsychol 2015; 37:931-45. [DOI: 10.1080/13803395.2015.1068280] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Girot M, Hubert H, Richard F, Chochoi M, Deplanque D, Derambure P, Girardie P, Pauchet N, Leblanc S, Lim A, Wiel E, Williate P, Szurhaj W, Lenne X, Tyvaert L. Use of emergency departments by known epileptic patients: An underestimated problem? Epilepsy Res 2015; 113:1-4. [DOI: 10.1016/j.eplepsyres.2015.02.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 12/01/2014] [Accepted: 02/27/2015] [Indexed: 10/23/2022]
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Szurhaj W. L’EEG dans l’exploration des troubles de la conscience et de la vigilance. Rev Neurol (Paris) 2015. [DOI: 10.1016/j.neurol.2015.01.491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hennion S, Sequeira H, D'Hondt F, Duhamel A, Lopes R, Tyvaert L, Derambure P, Szurhaj W, Delbeuck X. Arousal in response to neutral pictures is modified in temporal lobe epilepsy. Epilepsy Behav 2015; 45:15-20. [PMID: 25792137 DOI: 10.1016/j.yebeh.2015.02.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 01/07/2015] [Accepted: 02/04/2015] [Indexed: 11/17/2022]
Abstract
The objectives of the present study were to (i) better characterize visual emotional experience in patients with temporal lobe epilepsy (TLE), (ii) identify clinical risk factors that might be predictive of a change in emotional experience, and (iii) study the relationships between emotional experience and psychobehavioral/quality-of-life factors. Fifty patients with TLE and fifty matched controls evaluated the emotional content of unpleasant, pleasant, and neutral pictures with respect to their valence (unpleasant-to-pleasant) and arousal (low-to-high) levels. Demographic, cognitive, and psychobehavioral data were recorded for all participants, and clinical data and factors related to quality of life were also collected for patients with TLE. There were no significant differences between the group with TLE and the control group in terms of valence evaluations. However, arousal scores for neutral pictures were significantly higher in patients with TLE than in controls. There was also a nonsignificant trend towards lower arousal scores for pleasant pictures in patients with TLE than in controls. Although none of the recorded clinical factors were found to be related to emotional experience, the level of apathy was predictive of greater arousal experience for neutral pictures in patients with TLE. In conclusion, emotional experience appears to be modified in TLE and might be related to apathy. Changes in emotional experience should be taken into account in studies in which neutral stimuli are used to establish a baseline level when assessing emotional and cognitive processing.
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André-Obadia N, Parain D, Szurhaj W. Continuous EEG monitoring in adults in the intensive care unit (ICU). Neurophysiol Clin 2015; 45:39-46. [PMID: 25639999 DOI: 10.1016/j.neucli.2014.11.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 11/03/2014] [Indexed: 11/26/2022] Open
Abstract
Continuous EEG monitoring in the ICU is different from planned EEG due to the rather urgent nature of the indications, explaining the fact that recording is started in certain cases by the clinical team in charge of the patient's care. Close collaboration between neurophysiology teams and intensive care teams is essential. Continuous EEG monitoring can be facilitated by quantified analysis systems. This kind of analysis is based on certain signal characteristics, such as amplitude or frequency content, but raw EEG data should always be interpreted if possible, since artefacts can sometimes impair quantified EEG analysis. It is preferable to work within a tele-EEG network, so that the neurophysiologist has the possibility to give an interpretation on call. Continuous EEG monitoring is thus useful in the diagnosis of non-convulsive epileptic seizures or purely electrical discharges and in the monitoring of status epilepticus when consciousness disorders persist after initial treatment. A number of other indications are currently under evaluation.
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Szurhaj W, Lamblin MD, Kaminska A, Sediri H. EEG guidelines in the diagnosis of brain death. Neurophysiol Clin 2015; 45:97-104. [PMID: 25687591 DOI: 10.1016/j.neucli.2014.11.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 11/09/2014] [Indexed: 10/24/2022] Open
Abstract
In France, for the determination and diagnostic validation of brain death the law requires either two EEG recordings separated by a 4-hour observation period, both showing electrocerebral inactivity; or cerebral angiography examination. Since EEG is available in most hospitals and clinics, it is often used in this indication, at the patient's bedside, especially in the context of organ donation. However, very precise methodology must be followed. The last French guidelines date back to 1989, before the development of digital EEG recording. We present the new guidelines from the Société de Neurophysiologie Clinique de Langue Française. Electrocerebral inactivity may be confirmed when a 30-minute good quality EEG recording shows complete electrocerebral silence, defined as no cerebral activity greater than 2 uV, having first ruled out the possible influence of sedative drugs, metabolic disorders or hypothermia. In the presence of sedative drugs, CT brain angiography will be the gold standard test for this diagnosis. In the newborn, the utmost caution is indicated since electrocerebral inactivity can be observed in the absence of cerebral death. In the infant, the criterion for the observation period to be respected between both EEG recordings needs to be more clearly refined.
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Kouakam C, Szurhaj W, Guédon-Moreau L, Monpeurt C, Lacroix D, Derambure P, Kacet S. 0444: Usefulness of combined head-up tilt testing with video-EEG monitoring in the evaluation of patients with atypical seizure-like unexplained loss of consciousness. ARCHIVES OF CARDIOVASCULAR DISEASES SUPPLEMENTS 2015. [DOI: 10.1016/s1878-6480(15)71704-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lopes R, Moeller F, Besson P, Ogez F, Szurhaj W, Leclerc X, Siniatchkin M, Chipaux M, Derambure P, Tyvaert L. Study on the Relationships between Intrinsic Functional Connectivity of the Default Mode Network and Transient Epileptic Activity. Front Neurol 2014; 5:201. [PMID: 25346721 PMCID: PMC4193009 DOI: 10.3389/fneur.2014.00201] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 09/24/2014] [Indexed: 12/04/2022] Open
Abstract
Rationale: Simultaneous recording of electroencephalogram and functional MRI (EEG–fMRI) is a powerful tool for localizing epileptic networks via the detection of hemodynamic changes correlated with interictal epileptic discharges (IEDs). fMRI can be used to study the long-lasting effect of epileptic activity by assessing stationary functional connectivity during the resting-state period [especially, the connectivity of the default mode network (DMN)]. Temporal lobe epilepsy (TLE) and idiopathic generalized epilepsy (IGE) are associated with low responsiveness and disruption of DMN activity. A dynamic functional connectivity approach might enable us to determine the effect of IEDs on DMN connectivity and to better understand the correlation between DMN connectivity changes and altered consciousness. Method: We studied dynamic changes in DMN intrinsic connectivity and their relation to IEDs. Six IGE patients (with generalized spike and slow-waves) and 6 TLE patients (with unilateral left temporal spikes) were included. Functional connectivity before, during, and after IEDs was estimated using a sliding window approach and compared with the baseline period. Results: No dependence on window size was observed. The baseline DMN connectivity was decreased in the left hemisphere (ipsilateral to the epileptic focus) in TLEs and was less strong but remained bilateral in IGEs. We observed an overall increase in DMN intrinsic connectivity prior to the onset of IEDs in both IGEs and TLEs. After IEDs in TLEs, we found that DMN connectivity increased before it returned to baseline values. Most of the DMN regions with increased connectivity before and after IEDs were lateralized to the left hemisphere in TLE (i.e., ipsilateral to the epileptic focus). Conclusion: Results suggest that DMN connectivity may facilitate IED generation and may be affected at the time of the IED. However, these results need to be confirmed in a larger independent cohort.
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Hennion S, Delbeuck X, Duhamel A, Lopes R, Semah F, Tyvaert L, Derambure P, Szurhaj W. Characterization and prediction of theory of mind disorders in temporal lobe epilepsy. Neuropsychology 2014; 29:485-92. [PMID: 25068666 DOI: 10.1037/neu0000126] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
OBJECTIVE Patients with temporal lobe epilepsy (TLE) have impaired theory of mind (ToM). However, ToM involves a variety of processes, such as understanding a person's intentions ("cognitive" ToM) and emotional states ("affective" ToM). The objectives of the present study were to characterize ToM disorders in TLE patients, identify patients at risk of ToM disorders, and study the relationships between psychobehavioral and quality of life factors and ToM disorders. METHOD Fifty TLE patients and 50 controls performed ToM tasks assessing their understanding of verbal clumsiness (faux pas), sarcastic remarks, and mentalistic actions. Demographic, cognitive, and psychobehavioral data, and (for TLE patients) clinical and quality of life factors, were recorded. RESULTS Compared with controls, TLE patients showed impairments in all ToM tasks: 84% misunderstood faux pas, and around 50% misunderstood sarcasm. A long duration of epilepsy and young age at onset were risk factors for ToM impairments. In TLE patients, ToM impairments were associated with impaired empathy and anhedonia. Their affective states were less positively and more negatively valenced than in controls. Low positive affectivity was predictive of greater cognitive and affective ToM impairments for the faux pas task, and high negative affectivity was predictive of greater cognitive ToM abilities for the sarcasm task. The lack of social support was correlated with impaired ToM but was not a predictive factor. CONCLUSIONS Both cognitive and affective ToM processes are impaired in TLE patients. Impaired ToM has an impact on empathy abilities and is related to affective disturbances in TLE patients.
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Baille G, Kouakam C, Derambure P, Tyvaert L, Monpeurt C, Szurhaj W. P406: Interest of EEG recording during head-up tilt testing. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50514-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Frezel N, Boudet S, Reyns N, Szurhaj W. P1040: Intracerebral study of cortical activation during dissociated arousals. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)51074-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Boillot C, Lamblin MD, Warot M, Perriol MP, Bertran F, Annic A, Derambure P, Szurhaj W. P405: Value of the response to clonazepam in post-anoxic comas. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50513-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Peyrodie L, Gallois P, Boudet S, Cao H, Barbaste P, Szurhaj W. Evaluation of the AFOP/DAFOP Method for Automatic Filtering of EEGs of Patients With Epilepsy. J Clin Neurophysiol 2014; 31:152-61. [DOI: 10.1097/wnp.0000000000000039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Habets EJ, Taphoorn MJ, Nederend S, Klein M, Delgadillo D, Hoang-Xuan K, Bottomley A, Allgeier A, Seute T, Gijtenbeek AM, De Gans J, Enting RH, Tijssen CC, Van den Bent MJ, Reijneveld JC, Xu H, Halbert K, Bliss R, Trusheim J, Hunt MA, Bunevicius A, Tamasauskas S, Tamasauskas A, Deltuva V, Field KM, Guyatt N, Fleet M, Rosenthal MA, Drummond KJ, Field KM, Fleet M, Guyatt N, Drummond KJ, Rosenthal MA, Oliver H, Tobias M, Eva V, Matthias S, Johannes S, Oliver S, Christian TJ, Dietmar K, Gabriele S, Thomas R, Nikkhah G, Uwe S, Markus L, Michael W, Manfred W, Strowd RE, Swett K, Harmon M, Pop-Vicas A, Chan M, Tatter SB, Ellis TL, Blevins M, High K, Lesser GJ, Benouaich-Amiel A, Taillandier L, Vercueil L, Valton L, Szurhaj W, Idbaih A, Delattre JY, Loiseau H, Klein I, Block V, Ramirez C, Laigle-Donadey F, Le Rhun E, Harrison C, Van Horn A, Sapienza C, Schlimper C, Schlag H, Weber F, Acquaye AA, Gilbert MR, Armstrong TS, Acquaye AA, Vera-Bolanos E, Gilbert MR, Armstrong TS, Walbert T, Armstrong TS, Elizabeth VB, Gilbert M, Affronti ML, Woodring S, Allen K, Herndon JE, McSherry F, Peters KB, Friedman HS, Desjardins A, Freeman W, Cheshire S, Cone C, Kalinowski KH, Kim JY, Lay HH, Poillucci V, Southerland C, Tetterton J, Kirkpatrick J, Vredenburgh JJ, Affronti ML, Woodring S, Herndon JE, McSherry F, Peters KB, Friedman HS, Desjardins A, Freeman W, Cheshire S, Cone C, Kalinowski KH, Kim JY, Lay HH, Poillucci V, Southerland C, Tetterton J, Vredenburgh JJ, Edelstein K, Coate L, Mason WP, Jewitt NC, Massey C, Devins GM, Lin L, Chiang HH, Acquaye AA, Vera-Bolanos E, Cahill JE, Gilbert MR, Armstrong TS, Amidei CM, Lovely M, Page MD, Mogensen K, Arzbaecher J, Lupica K, Maher ME, Lin L, Acquaye AA, Vera-Bolanos E, Cahill JE, Gilbert MR, Armstrong TS, Duong HT, Kelly DF, Peters KB, Woodring S, Herndon JE, McSherry F, Vredenburgh JJ, Desjardins A, Friedman HS, Gning I, Armstrong TS, Wefel JS, Acquaye AA, Vera-Bolanos E, Mendoza TR, Gilbert MR, Cleeland CS, Guthikonda B, Thakur JD, Banerjee A, Shorter C, Sonig A, Khan IS, Gardner GL, Nanda A, Reddy K, Gaspar L, Kavanagh B, Waziri A, Chen C, Boele F, Hoeben W, Hilverda K, Lenting J, Calis AL, Sizoo E, Collette E, Heimans J, Postma T, Taphoorn M, Reijneveld J, Klein M. CLIN-SYMPTOM MANAGEMENT/QUALITY OF LIFE. Neuro Oncol 2012; 14:vi153-vi159. [PMCID: PMC3488794 DOI: 10.1093/neuonc/nos240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023] Open
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Szurhaj W. Les pièges de L’EEG. Rev Neurol (Paris) 2012. [DOI: 10.1016/j.neurol.2012.01.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Creze M, Jissendi P, Besson P, Verscheure L, Szurhaj W, Pruvo JP, Deramond H, Leclerc X. Étude de l’épaisseur et de la complexité corticales dans l’épilepsie réfractaire associée à une dysplasie corticale focale. J Neuroradiol 2012. [DOI: 10.1016/j.neurad.2012.01.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bocquillon P, Dujardin K, Betrouni N, Phalempin V, Houdayer E, Bourriez JL, Derambure P, Szurhaj W. Attention impairment in temporal lobe epilepsy: a neurophysiological approach via analysis of the P300 wave. Hum Brain Mapp 2009; 30:2267-77. [PMID: 19034898 DOI: 10.1002/hbm.20666] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
PURPOSE Attention is often impaired in temporal lobe epilepsy (TLE). The P300 wave (an endogenous, event-related potential) is a correlate of attention which is usually recorded during an "oddball paradigm," where the subject is instructed to detect an infrequent target stimulus presented amongst frequent, standard stimuli. Modifications of the P300 wave's latency and amplitude in TLE have been suggested, but it is still not known whether the source regions also differ. Our hypothesis was that temporal lobe dysfunction would modify the P3 source regions in TLE patients. METHODS A comparative, high density, 128-channel electroencephalographic analysis of the characteristics of P300 (P3b latency and amplitude) was performed in 10 TLE patients and 10 healthy controls during auditory and visual oddball paradigms. The P3b sources were localized on individual 3D MR images using the LORETA method and intergroup statistical comparisons were performed using SPM2(R) software. RESULTS Our main results (in both individual analyses and intergroup comparisons) revealed a reduction in temporal (and more particularly mesiotemporal) sources and, to a lesser extent, frontal sources in TLE patients, compared with controls. DISCUSSION This reduction may reflect direct, local cortical dysfunction caused by the epileptic focus or more complex interference between epileptic networks and normal attentional pathways.
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