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Journal of Computational Neuroscience

Erschienen in:

01.12.2009

Recurrent networks with short term synaptic depression

verfasst von: Lawrence Christopher York, Mark C. W. van Rossum

Erschienen in: Journal of Computational Neuroscience | Ausgabe 3/2009

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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.

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Titel: Recurrent networks with short term synaptic depression
verfasst von: Lawrence Christopher York
Mark C. W. van Rossum
Publikationsdatum: 01.12.2009
Verlag: Springer US
Erschienen in: Journal of Computational Neuroscience / Ausgabe 3/2009
Print ISSN: 0929-5313
Elektronische ISSN: 1573-6873
DOI: https://doi.org/10.1007/s10827-009-0172-4

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