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Synaptic regulation on various STDP rules
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DOI：10.1016/j.neucom.2004.01.066.png)
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An additive rule of spike-timing-dependent synaptic plasticity (STDP) automatically achieves synaptic competition and activity regulation, where synaptic balance is moderately regulated to control the post synaptic activity (Song et al., Nature Neurosci. 3 (2000) 919). On the other hand, asymmetrically multiplicative STDP rules cannot achieve the synaptic competition nor the synaptic regulation (Rubin et al., Phys. Rev. Lett. 86 (2001) 364; van Rossum et al., J. Neuroscience 20 (2000) 8812). These works suggest that synaptic efficacy dependence in updating rule is relevant for synaptic competition and activity regulation. There is another possible factor relevant for activity regulation. Various types of spike pair-to-pair interactions on STDP have been found (Froemke and Dan, Nature 416 (2002) 433; Sjostrom et al., Neuron 32 (2001) 1149). It is not clear what type of rules can achieve activity regulation and how it is related to synaptic competition. Here we demonstrate various types of updating rules and show that symmetry in synaptic efficacy dependence is relevant for activity regulation, and that activity regulation is independent from competition. (C) 2004 Elsevier B.V. All rights reserved.
Keyword:
STDP
efficacy dependence
synaptic distribution
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