Binocular rivalry waves in a directionally selective neural field model
File(s)Stimulus MotionR1.pdf (2.03 MB)
Accepted version
Author(s)
Carroll, Samuel R
Bressloff, Paul C
Type
Journal Article
Abstract
We extend a neural field model of binocular rivalry waves in the visual cortex to incorporate direction selectivity of moving stimuli. For each eye, we consider a one-dimensional network of neurons that respond maximally to a fixed orientation and speed of a grating stimulus. Recurrent connections within each one-dimensional network are taken to be excitatory and asymmetric, where the asymmetry captures the direction and speed of the moving stimuli. Connections between the two networks are taken to be inhibitory (cross-inhibition). As per previous studies, we incorporate slow adaption as a symmetry breaking mechanism that allows waves to propagate. We derive an analytical expression for traveling wave solutions of the neural field equations, as well as an implicit equation for the wave speed as a function of neurophysiological parameters, and analyze their stability. Most importantly, we show that propagation of traveling waves is faster in the direction of stimulus motion than against it, which is in agreement with previous experimental and computational studies.
Date Issued
2014-10-01
Date Acceptance
2014-07-09
Citation
Physica D: Nonlinear Phenomena, 2014, 285, pp.8-17
ISSN
0167-2789
Publisher
Elsevier BV
Start Page
8
End Page
17
Journal / Book Title
Physica D: Nonlinear Phenomena
Volume
285
Copyright Statement
Copyright © Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
http://dx.doi.org/10.1016/j.physd.2014.07.002
Publication Status
Published
Date Publish Online
2014-07-16