Voltage synchronizations between multichannel electroencephalograms during epileptic seizures

TL;DR

This study investigates synchronization patterns in EEG recordings from epileptic patients, revealing alternating synchronization and desynchronization events during seizures, which can be used for seizure detection.

Contribution

It introduces an analysis of interdependencies in EEG signals during seizures, highlighting the dynamic synchronization patterns in epileptic activity.

Findings

Strong synchronization-desynchronization alternations occur during seizures

Seizures are detected with 71 out of 79 sensitivity

EEG interdependencies vary dynamically during ictal events

Abstract

The underlying dynamics for the electroencephalographic (EEG) recordings from humans but especially epilepsy patients are usually not completely known. However, the ictal activity is claimed to be characterized by synchronous oscillations in the brain voltages in the literature. These time dependent interdependencies (synchronization, coupling) between the EEG voltages from epileptogenic and non epileptogenic brain sites of nineteen focal epileptic patients are investigated in this work. It is found that strong synchronizationdesynchronization events occur in alternation during most of the investigated seizures. Thus, these seizures are detected with considerable sensitivity (71 of the 79 seizures).