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Recurrent networks with short term synaptic depression

Research output: Contribution to journalArticlepeer-review

Original languageEnglish
Pages (from-to)607-620
Number of pages14
JournalJournal of Computational Neuroscience
Volume27
Issue number3
DOIs
Publication statusPublished - Dec 2009

Abstract

Cortical circuitry shows an abundance of recurrent connections. A widely used model that relies on recurrence is the ring attractor network, which has been used to describe phenomena as diverse as working memory, visual processing and head direction cells. Commonly, the synapses in these models are static. Here, we examine the behaviour of ring attractor networks when the recurrent connections are subject to short term synaptic depression, as observed in many brain regions. We find that in the presence of a uniform background current, the network activity can be in either of three states: a stationary attractor state, a uniform state, or a rotating attractor state. The rotation speed can be adjusted over a large range by changing the background current, opening the possibility to use the network as a variable frequency oscillator or pattern generator. Finally, using simulations we extend the network to two-dimensional fields and find a rich range of possible behaviours.

    Research areas

  • Short term synaptic depression , Ring attractor network , Propagating activity

ID: 4375016