by DE ARCANGELIS Lucilla, PERRONE CAPANO C., HERRMANN H. J.
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.
Reference:
Self-organized criticality model for brain plasticity (DE ARCANGELIS Lucilla, PERRONE CAPANO C., HERRMANN H. J.), In PHYSICAL REVIEW LETTERS, volume 96, 2006. (Articolo in rivista)
Bibtex Entry:
@article{dea06,
author = {DE ARCANGELIS Lucilla, and PERRONE CAPANO C., and HERRMANN H. J.,},
pages = {281071-281074},
title = {Self-organized criticality model for brain plasticity},
volume = {96},
note = {Articolo in rivista},
issn = {0031-9007},
journal = {PHYSICAL REVIEW LETTERS},
year = {2006},
wosId = {000234758100109},
scopusId = {2-s2.0-32644482156},
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.}
}