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Neurons in Striate Cortex Signal Disparity in Half-Matched Random-Dot Stereograms

Lookup NU author(s): Sid Henriksen, Professor Jenny ReadORCiD



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


Human stereopsis can operate in dense "cyclopean" images containing no monocular objects. This is believed to depend on the computation of binocular correlation by neurons in primary visual cortex (V1). The observation that humans perceive depth in half-matched random-dot stereograms, although these stimuli have no net correlation, has led to the proposition that human depth perception in these stimuli depends on a distinct "matching" computation possibly performed in extrastriate cortex. However, recording from disparity-selective neurons in V1 of fixating monkeys, we found that they are in fact able to signal disparity in half-matched stimuli. We present a simple model that explains these results. This reinstates the view that disparity-selective neurons in V1 provide the initial substrate for perception in dense cyclopean stimuli, and strongly suggests that separate correlation and matching computations are not necessary to explain existing data on mixed correlation stereograms.

Publication metadata

Author(s): Henriksen S, Read JCA, Cumming BG

Publication type: Article

Publication status: Published

Journal: Journal of Neuroscience

Year: 2016

Volume: 36

Issue: 34

Pages: 8967-8976

Print publication date: 24/08/2016

Acceptance date: 17/06/2016

Date deposited: 25/10/2016

ISSN (print): 0270-6474

ISSN (electronic): 1529-2401

Publisher: Society for Neuroscience


DOI: 10.1523/JNEUROSCI.0642-16.2016

PubMed id: 27559177


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Funder referenceFunder name
Intramural Research Program at the National Eye Institute/National Institutes of Health
100931/Z/13/ZWellcome Trust/National Institutes of Health joint PhD Studentship
100931/Z/13/ZWellcome Trust