Why neuronal dynamics should control synaptic learning rules

by J. Tegnér, A. Kepecs, T. G. Dietterich, S. Becker, Z. Ghahramani (eds.)
Year:2002

Bibliography

Why neuronal dynamics should control synaptic learning rules
J. Tegnér and A. Kepecs, T. G. Dietterich, S. Becker, and Z. Ghahramani (eds.)
Advances in Neural Information Processing Systems (NIPS) 14: 135-142. MIT Press, Cambridge, MA, 2002

Abstract

​Hebbian learning rules are generally formulated as static rules. Under changing condition (e.g. neuromodulation, input statistics) most rules are sensitive to parameters. In particular, recent work has focused on two different formulations of spike-timing-dependent plasticity rules. Additive STDP is remarkably versatile but also very fragile, whereas multiplicative STDP [2, 3] is more robust but lacks attractive features such as synaptic competition and rate stabilization. Here we address the problem of robustness in the additive STDP rule. We derive an adaptive control scheme, where the learning function is under fast dynamic control by postsynaptic activity to stabilize learning under a variety of conditions. Such a control scheme can be implemented using known biophysical mechanisms of synapses. We show that this adaptive rule makes the additive STDP more robust. Finally, we give an example how meta plasticity of the adaptive rule can be used to guide STDP into different type of learning regimes.

ISBN: 0-262-04208-8

Why neuronal dynamics should control synaptic learning rules.pdf

Keywords

Control scheme STDP LTP Hebbian learning rule Potentia
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