https://doi.org/10.1007/s100510051008
Experimental evidence for a power law in electroencephalographic α-wave dynamics
1
Groupe de Physique Théorique, Institut de
Physique Nucléaire,
91406 Orsay Cedex, France
2
Laboratoire d'Explorations Fonctionnelles,
Hôpital Robert Ballanger, 93602 Aulnay-sous-bois, France
Corresponding author: a wallet@ipno.in2p3.fr
Received:
10
December
1998
Revised:
10
May
1999
Published online: 15 November 1999
We perform an experimental study of the time behavior of
the α-wave events occurring in human electroencepholographic signals.
When the subjects have to keep their eyes open, we find that
the fraction of the time spent in an α-burst of time size τ
exhibits a scaling behavior as a function of τ. The corresponding
exponent is equal to
. Furthermore, we show that our
experimental result may have a possible explanation within a class of
Self-Organized Critical (SOC) models recently proposed by Boettcher and
Paczuski. In particular, one of these models,
when properly re-interpreted, appears to be consistent both with our
experimental result and a physiological
description of the possible origin of α-wave events.
PACS: 87.10.+e – General theory and mathematical aspects / 05.45.-a – Nonlinear dynamics and nonlinear dynamical systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
