Discrimination of deterministic dynamics in the spontaneous activity of the human brain cortex

Year: 1998

Authors: Narici L., Boccaletti S., Giaquinta A., Arecchi F.T.

Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
Department of Physics, University of Firenze, 50125 Firenze, Italy;
Dipartimento di Fisica, Universitą di Roma Tor Vergata, Roma, Italy;
Department of Physics and Applied Mathematic, Universidad de Navarra, Pamplona, Spain,
Dipartimento di Sistemi e Informatica, Universitą di Firenze, Firenze, Italy

Abstract: 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 alpha-band (8-12 Hz).

Journal/Review: EUROPHYSICS LETTERS

Volume: 42 (3)      Pages from: 247  to: 252

KeyWords: Strange Attractors; Chaos; Dimension; Signals
DOI: 10.1209/epl/i1998-00237-5

Citations: 2
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