Avalanches in directed complex networks of neurons connected by stochastic synapses

Details Avalanches in directed complex networks of neurons connected by stochastic synapses Avalanches in directed complex networks of neurons connected by stochastic synapses

2009-02-13

arxiv.org/abs/0902.2297v2

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 figures, submitted to EPL

Scientific paper

Directed complex network of two-state model neurons linked by synapses which can be blocked or activated stochastically in time undergoes phase transition between the quiescent phase with zero activity and the active one with persistent activity. Avalanches of activity appear in the quiescent phase after occasional excitation of randomly chosen neuron. Size and duration distributions of long avalanches which we observe near phase transition point are exponential. Only a small fraction of all neurons are active at any moment of a long avalanche.

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