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Phys Rev Lett. 2006 Jan 20;96(2):028107. Epub 2006 Jan 19.

Self-organized criticality model for brain plasticity.

Author information

1
Dept. of Information Engineering and CNISM, Second University of Naples, 81031 Aversa (CE), Italy.

Abstract

Networks of living neurons exhibit an avalanche mode of activity, experimentally found in organotypic cultures. Here we present a model that is based on self-organized criticality and takes into account brain plasticity, which is able to reproduce the spectrum of electroencephalograms (EEG). The model consists of an electrical network with threshold firing and activity-dependent synapse strengths. The system exhibits an avalanche activity in a power-law distribution. The analysis of the power spectra of the electrical signal reproduces very robustly the power-law behavior with the exponent 0.8, experimentally measured in EEG spectra. The same value of the exponent is found on small-world lattices and for leaky neurons, indicating that universality holds for a wide class of brain models.

PMID:
16486652
DOI:
10.1103/PhysRevLett.96.028107
[Indexed for MEDLINE]

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