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Discerning nonstationarity from nonlinearity in seizure-free and preseizure EEG recordings from epilepsy patients

TitleDiscerning nonstationarity from nonlinearity in seizure-free and preseizure EEG recordings from epilepsy patients
Publication TypeJournal Article
2003
AuthorsRieke C, Mormann F, Andrzejak RG, Kreuz T, David P, Elger CE, Lehnertz K
JournalIEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
Volume50
Pagination634-639
Date PublishedMAY
ISSN0018-9294

A number of recent studies indicate that nonlinear electroencephalogram (EEG) analyses allow to define a state predictive of an impending epileptic seizure. In this paper, we combine a method for detecting nonlinear determinism with a novel test for stationarity to characterize EEG recordings from both the seizure-free interval and the preseizure phase. We discuss differences between these periods, particularly an increased occurrence of stationary, nonlinear segments prior to seizures. These differences seem most prominent for recording sites within the seizure-generating area and for EEG segments less than one minute's length.

10.1109/TBME.2003.810684