Neuronalavalanchesareanovelmodeofactivityinneuronalnetworks,experimentallyfoundinvitroandinvivo,andexhibitarobustcriticalbehavior:theseavalanchesarechar-acterizedbyapowerlawdistributionforthesizeandduration,featuresfoundinotherproblemsinthecontextofthephysicsofcomplexsystems.Wepresentarecentmodelinspiredinself-organizedcriticality,whichconsistsofanelectricalnetworkwiththresholdfiring,refractoryperiod,andactivity-dependentsynapticplasticity.Themodelreproducesthecriticalbehaviorofthedistributionofavalanchesizesanddurationsmeasuredexperi-mentally.Moreover,thepowerspectraoftheelectricalsignalreproduceveryrobustlythepowerlawbehaviorfoundinhumanelectroencephalogram(EEG)spectra.Weimplementthismodelonavarietyofcomplexnetworks,i.e.,regular,small-world,andscale-freeandverifytherobustnessofthecriticalbehavior.
Activity-dependent neuronal model on complex networks
DE ARCANGELIS, Lucilla;
2012
Abstract
Neuronalavalanchesareanovelmodeofactivityinneuronalnetworks,experimentallyfoundinvitroandinvivo,andexhibitarobustcriticalbehavior:theseavalanchesarechar-acterizedbyapowerlawdistributionforthesizeandduration,featuresfoundinotherproblemsinthecontextofthephysicsofcomplexsystems.Wepresentarecentmodelinspiredinself-organizedcriticality,whichconsistsofanelectricalnetworkwiththresholdfiring,refractoryperiod,andactivity-dependentsynapticplasticity.Themodelreproducesthecriticalbehaviorofthedistributionofavalanchesizesanddurationsmeasuredexperi-mentally.Moreover,thepowerspectraoftheelectricalsignalreproduceveryrobustlythepowerlawbehaviorfoundinhumanelectroencephalogram(EEG)spectra.Weimplementthismodelonavarietyofcomplexnetworks,i.e.,regular,small-world,andscale-freeandverifytherobustnessofthecriticalbehavior.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
