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A computer method for identifying patterns in electroencephalogram signals
1Equipe de Bioinformatique Théorique, Laboratoire des Sciences de l'Image, de l'Informatique et de la Télédétection (LSIIT), UMR CNRS-ULP 7005, Université Louis Pasteur Strasbourg, Pôle API, Illkirch, France. michel@dpt-info.u-strasbg.fr
Abstract:
A computer method is developed for identifying patterns in electroencephalogram (EEG) signals. An EEG numerical signal is transformed into a symbolic series. The simple transformation used here studies the variations between two successive values of the signal. Then, this series is analysed with a symbolic correlation function based on probabilities without bias. The use of large windows, e.g. 1 hour, allows the identification of weak signals hidden by the specific ones. An application of this method to the sleep analysis of a healthy adult shows a periodicity modulo 10 in all derivations. A possible neurophysiological meaning is presented in the discussion.