Information processing occurs via critical avalanches in a model of the primary visual cortex

8th Brazilian Meeting on Simulational Physics

Bortolotto, G.S.^1 ; Girardi-Schappo, M.^1 ; Gonsalves, J.J.^1 ; Pinto, L.T.^2 ; Tragtenberg, M.H.R.^1

Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis

SC

88040-900, Brazil^1

Departamento de Engenharia Química e de Alimentos, Universidade Federal de Santa Catarina, Florianópolis

SC

88040-900, Brazil^2

关键词: Critical exponent;    Excitatory post synaptic potentials;    Network structures;    Primary visual cortex;    Scaling relations;    Synaptic parameters;    Thermodynamic limits;    Visual stimulus;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/686/1/012008/pdf
DOI  :  10.1088/1742-6596/686/1/012008

来源: IOP

【 摘 要 】

We study a new biologically motivated model for the Macaque monkey primary visual cortex which presents power-law avalanches after a visual stimulus. The signal propagates through all the layers of the model via avalanches that depend on network structure and synaptic parameter. We identify four different avalanche profiles as a function of the excitatory postsynaptic potential. The avalanches follow a size-duration scaling relation and present critical exponents that match experiments. The structure of the network gives rise to a regime of two characteristic spatial scales, one of which vanishes in the thermodynamic limit.