Discrimination of deterministic dynamics in the spontaneous activity of the human brain cortex
Istituto Nazionale di Ottica, 50125
Accepted: 17 March 1998
We apply a new strategy to isolate cortical rhythms as deterministic signals and discuss several related topics. Extraction of the relevant signal from the original data is achieved by a novel use of the localized filtering action of the wavelet transform. Alternative nonlinear data analysis tools are used to test the validity of the procedure. In the case of neuromagnetic signals measured on the occipital cortex of a normal subject, we demonstrate the existence of a deterministic activity within the α-band (8–12 Hz).
PACS: 05.45.+b – Theory and models of chaotic systems / 87.40.+w – Biomagnetism (cardiomagnetism, neuromagnetism, tissue susceptibility) and magnetobiology (magnetic field effects on cellular processes, and on navigation and behavior of various species) / 87.22.-q – Physics of cellular and physiological processes
© EDP Sciences, 1998