Application of nonlinear dynamics in biosignal analysis

摘要

We apply methods based on nonlinear dynamics to several problems in biosignals analysis. We concentrate mainly on EEG-signals, but the methods are applicable also to other biosignals used in medical diagnosis. In particular, we use two methods - Higuchi fractal dimension method and our own symbolic dynamics method. Both methods measure signal complexity and may be applied as medical diagnostic tools for characterizing changes induced by different pathologies, for computerized classification of sleep stages, for quantitative assessing of influence of electromagnetic fields, of photo-therapy, of administered drugs, of the depth of anaesthesia.