Cross-frequency coupling in mesiotemporal EEG recordings of epileptic patients

Détails

ID Serval
serval:BIB_49640B324297
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Cross-frequency coupling in mesiotemporal EEG recordings of epileptic patients
Périodique
Journal of Physiology - Paris
Auteur(s)
Villa  A. E. P., Tetko  I. V.
ISSN
0928-4257
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
104
Numéro
3-4
Pages
197-202
Langue
anglais
Notes
Villa2010197
Résumé
Semi-invasive foramen ovate (Fov) electrodes were used to record electrical activity in the vicinity of the inferior mesial temporal region of epileptic patients, in addition to standard scalp EEG. Third order cumulant analysis was used to measure the phase-coupled frequencies corresponding to non-linear coupling of spectral frequency components, somewhat analogous to frequencies of resonance. On the basis of the distribution of these frequencies, an index of resonance (IR) is defined as the ratio between the number of peaks in the gamma-band (40-55 Hz) vs. the number of peaks in the beta-band (15-30 Hz). The epileptogenic focus was located in the hemisphere with lower resonant frequencies because these frequencies were characteristic of a spread of the seizure over a broader area. In the case of Fov electrodes IR could differentiate a group of patients affected by a tumor compared to patients with mesial temporal sclerosis. The novel index IR appears as an interesting parameter to evaluate the level of interareal functional connectivity in Fov recordings in epileptic patients, but its usage is likely to be extended in electrophysiological studies.
Mots-clé
Mesiotemporal lobe epilepsy, Epileptic focus, Cortico-cortical resonances, Bispectrum, Bicoherence
Web of science
Création de la notice
23/08/2010 16:52
Dernière modification de la notice
20/08/2019 14:56
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