Affiliation:
1. Epileptology and Cerebral Rhythmology APHM, Timone Hospital Marseille France
2. INSERM, INS, Institut de Neurosciences des Systèmes Aix‐Marseille Universite Marseille France
Abstract
AbstractThe postictal state, an abnormal cerebral condition following a seizure until the return to the interictal baseline, is frequently overlooked, despite often exceeding ictal duration and significantly impacting patients' lives. This study analyzes stereo‐EEG (SEEG) signal dynamics using permutation entropy to quantify recovery time (postictal alteration time – PAT) in focal epilepsy and its clinical correlations. The average PAT was 4.5 min, extending up to an hour and was highest in temporal epilepsy and hippocampal sclerosis. Correlating with age at seizure onset and at SEEG, PAT provides a solution for operationally defining the postictal state and guiding interventions.