Nonlinear Sciences – Adaptation and Self-Organizing Systems
Scientific paper
2009-01-07
Nonlinear Sciences
Adaptation and Self-Organizing Systems
13 pages, 3 figures
Scientific paper
We calculate a measure of statistical complexity from the global dynamics of electroencephalographic (EEG) signals from healthy subjects and epileptic patients, and are able to stablish a criterion to characterize the collective behavior in both groups of individuals. It is found that the collective dynamics of EEG signals possess relative higher values of complexity for healthy subjects in comparison to that for epileptic patients. To interpret these results, we propose a model of a network of coupled chaotic maps where we calculate the complexity as a function of a parameter and relate this measure with the emergence of nontrivial collective behavior in the system. Our results show that the presence of nontrivial collective behavior is associated to high values of complexity; thus suggesting that similar dynamical collective process may take place in the human brain. Our findings also suggest that epilepsy is a degenerative illness related to the loss of complexity in the brain.
Cosenza M. G.
Escalona-Morán M.
Garcia Paulo
López-Ruiz Ricardo
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