Self-organization using synaptic plasticity

Details Self-organization using synaptic plasticity Self-organization using synaptic plasticity

2008-08-22

arxiv.org/abs/0808.3129v2

Nonlinear Sciences

Adaptation and Self-Organizing Systems

8 pages, 5 figures, after review NIPS'08

Scientific paper

Large networks of spiking neurons show abrupt changes in their collective dynamics resembling phase transitions studied in statistical physics. An example of this phenomenon is the transition from irregular, noise-driven dynamics to regular, self-sustained behavior observed in networks of integrate-and-fire neurons as the interaction strength between the neurons increases. In this work we show how a network of spiking neurons is able to self-organize towards a critical state for which the range of possible inter-spike-intervals (dynamic range) is maximized. Self-organization occurs via synaptic dynamics that we analytically derive. The resulting plasticity rule is defined locally so that global homeostasis near the critical state is achieved by local regulation of individual synapses.

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