Dynamical synapses causing self-organized criticality in neural networks

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We show that a network of spiking neurons exhibits robust self-organized criticality if the synaptic efficacies follow realistic dynamics. Deriving analytical expressions for the average coupling strengths and inter-spike intervals, we demonstrate that networks with dynamical synapses exhibit critical avalanche dynamics for a wide range of interaction parameters. We prove that in the thermodynamical limit the network becomes critical for all large enough coupling parameters. We thereby explain experimental observations in which cortical neurons show avalanche activity with the total intensity of firing events being distributed as a power-law.
9 pages, 4 figures

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Statistical Mechanics, Disordered Systems and Neural Networks, Neurons and Cognition

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http://salesiana.dossiersoluciones.com/handle/123456789/143697

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0712.1003
 http://arxiv.org/abs/0712.1003
 A. Levina, J. M. Herrmann, T. Geisel. Dynamical synapses causing self-organized criticality in neural networks, Nature Phys. 3, 857-860 (2007)
 doi:10.1038/nphys758

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arXiv