Impact of deviation from precise balance of spike-timing-dependent plasticity

Details Impact of deviation from precise balance of spike-timing-dependent plasticity Impact of deviation from precise balance of spike-timing-dependent plasticity

2002-11-22

arxiv.org/abs/cond-mat/0211503v2

Physics

Condensed Matter

Disordered Systems and Neural Networks

24 pages, 5 figures

Scientific paper

Recent biological experimental findings have shown that synaptic plasticity depends on the relative timing of pre- and post-synaptic spikes and this is called spike-timing-dependent plasticity (STDP). Many authors have claimed that a precise balance between long-term potentiation (LTP) and long-term depression (LTD) of STDP is crucial in the storage of spatio-temporal patterns. Some authors have numerically investigated the impact of an imbalance between LTP and LTD on the network properties. However, the mathematical mechanism remains unknown. We analytically show that an associative memory network has the robust retrieval properties of spatio-temporal patterns, and these properties make the network less vulnerable to any deviation from a precise balance between LTP and LTD when the network contains a finite number of neurons.

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