Slow modulations of high-frequency activity (40-140-Hz) discriminate preictal changes in human focal epilepsy. - Inria - Institut national de recherche en sciences et technologies du numérique Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2013

Slow modulations of high-frequency activity (40-140-Hz) discriminate preictal changes in human focal epilepsy.

Résumé

Recent evidence suggests that some seizures are preceded by preictal changes that start from minutes to hours before an ictal event. Nevertheless an adequate statistical evaluation in a large database of continuous multiday recordings is still missing. Here, we investigated the existence of preictal changes in long-term intracranial recordings from 53 patients with intractable partial epilepsy (in total 531 days and 558 clinical seizures). We describe a measure of brain excitability based on the slow modulation of high-frequency gamma activities (40-140 Hz) in ensembles of intracranial contacts. In prospective tests, we found that this index identified preictal changes at levels above chance in 13.2% of the patients (7/53), suggesting that results may be significant for the whole group (p < 0.05). These results provide a demonstration that preictal states can be detected prospectively from EEG data. They advance understanding of the network dynamics leading to seizure and may help develop novel seizure prediction algorithms.

Dates et versions

hal-01252648 , version 1 (07-01-2016)

Identifiants

Citer

C Alvarado-Rojas, M Valderrama, A Fouad-Ahmed, H Feldwisch-Drentrup, M Ihle, et al.. Slow modulations of high-frequency activity (40-140-Hz) discriminate preictal changes in human focal epilepsy.. Scientific Reports, 2013, 4, pp.4545. ⟨hal-01252648⟩
94 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More