STDP pattern onset learning depends on background activity

James Humble, Steve Furber, Susan L. Denham, Thomas Wennekers

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Spike-timing dependent plasticity is a learning mechanism used extensively within neural modelling. The learning rule has previously been shown to allow a neuron to learn a repeated spatio-temporal pattern among its afferents and respond at its onset. In this study we reconfirm these previous results and additionally adduce that such learning is dependent on background activity. Furthermore, we found that the onset learning is unstable when in a noisy framework. Specifically, if the level of background activity changes during learning the response latency of a neuron may increase and with the adding of additional noise the distribution of response latencies degrades. Consequently, we present preliminary insights into the neuron's encoding: viz. that a neuron may encode the coincidence of spikes from a subsection of a stimulus' afferents, but the temporal precision of the onset response depends on some background activity, which must be similar to that present during learning. © 2011 Springer Science+Business Media, LLC.

Original languageEnglish
Title of host publicationFrom Brains to Systems
Subtitle of host publicationProceedings of Brain-Inspired Cognitive Systems 2010
Pages19-31
Number of pages13
DOIs
Publication statusPublished - 2011
EventBrain Inspired Cognitive Systems 2010 - Madrid , Spain
Duration: 14 Jul 201016 Jul 2010

Publication series

NameAdvances in Experimental Medicine and Biology
Volume718
ISSN (Print)00652598

Conference

ConferenceBrain Inspired Cognitive Systems 2010
Abbreviated titleBICS 2010
Country/TerritorySpain
CityMadrid
Period14/07/1016/07/10

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