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Content Provider | IEEE Xplore Digital Library |
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Author | Florian, R.V. |
Copyright Year | 2005 |
Description | Author affiliation: Center for Cognitive & Neural Studies (Coneural), Cluj-Napoca, Romania (Florian, R.V.) |
Abstract | The paper presents a new reinforcement learning mechanism for spiking neural networks. The algorithm is derived for networks of stochastic integrate-and-fire neurons, but it can be also applied to generic spiking neural networks. Learning is achieved by synaptic changes that depend on the firing of pre- and postsynaptic neurons, and that are modulated with a global reinforcement signal. The efficacy of the algorithm is verified in a biologically-inspired experiment, featuring a simulated worm that searches for food. Our model recovers a form of neural plasticity experimentally observed in animals, combining spike-timing-dependent synaptic changes of one sign with non-associative synaptic changes of the opposite sign determined by presynaptic spikes. The model also predicts that the time constant of spike-timing-dependent synaptic changes is equal to the membrane time constant of the neuron, in agreement with experimental observations in the brain. This study also led to the discovery of a biologically-plausible reinforcement learning mechanism that works by modulating spike-timing-dependent plasticity (STDP) with a global reward signal. |
File Size | 213733 |
File Format | |
ISBN | 0769524532 |
DOI | 10.1109/SYNASC.2005.13 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2005-09-25 |
Publisher Place | Romania |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Learning Animals Biological system modeling Neural networks Neurons Stochastic processes Predictive models Brain modeling Biomembranes Biological neural networks |
Content Type | Text |
Resource Type | Article |
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