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Timing Intervals Using Population Synchrony and Spike Timing Dependent Plasticity

Lookup NU author(s): Dr Wei Xu, Professor Stuart Baker

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

We present a computational model by which ensembles of regularly spiking neurons can encode different time intervals through synchronous firing. We show that a neuron responding to a large population of convergent inputs has the potential to learn to produce an appropriately-timed output via spike-time dependent plasticity. We explain why temporal variability of this population synchrony increases with increasing time intervals. We also show that the scalar property of timing and its violation at short intervals can be explained by the spike-wise accumulation of jitter in the inter-spike intervals of timing neurons. We explore how the challenge of encoding longer time intervals can be overcome and conclude that this may involve a switch to a different population of neurons with lower firing rate, with the added effect of producing an earlier bias in response. Experimental data on human timing performance show features in agreement with the model's output.


Publication metadata

Author(s): Xu W, Baker SN

Publication type: Article

Publication status: Published

Journal: Frontiers in Computational Neuroscience

Year: 2016

Volume: 10

Online publication date: 01/12/2016

Acceptance date: 15/11/2016

Date deposited: 26/01/2017

ISSN (electronic): 1662-5188

Publisher: Frontiers Research Foundation

URL: http://dx.doi.org/10.3389/fncom.2016.00123

DOI: 10.3389/fncom.2016.00123


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