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November 2021

Towards a quantitative characterisation of functional states of the brain: from the non-linear methodology to the global linear description

Journal/Book: Int J Psychophysiol. 1999; 34: PO Box 211, 1000 AE Amsterdam, Netherlands. Elsevier Science Bv. 65-80.

Abstract: The paper traces the development of a global approach to the electric activity of the brain, from its roots in non-linear dynamical approach to the current state of art. The rationale of a three-dimensional system of global multichannel EEG descriptors (Sigma, Phi and Omega) is provided and results obtained by means of the global descriptors in various application areas are summarised. Finally, arguments in favour of a global, 'holistic' assessment of brain functional states are presented. Definitions and properties of the global EEG descriptors are summarised in the Appendix.

Note: Article Wackermann J, Inst Grenzgebiete Psychol, Wilhelmstr 3A, D-79098 Freiburg, GERMANY

Keyword(s): electrical activity of brain; EEG; dimensional complexity; omega complexity; global descriptors; brain functional states; NONLINEAR EEG MEASURES; SLOW-WAVE ACTIVITY; DIMENSIONAL COMPLEXITY; MULTICHANNEL EEG; STRANGE ATTRACTORS; SLEEP; CHAOS; ELECTROENCEPHALOGRAM; RECONSTRUCTION; DYNAMICS

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