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Lookup NU author(s): Professor Jenny ReadORCiD
One of the fundamental challenges of binocular vision is that objects project to different positions on the two retinas (binocular disparity). Neurons in visual cortex show two distinct types of tuning to disparity, position and phase disparity, which are the results of differences in receptive field location and profile, respectively. Here, we point out that phase disparity does not occur in natural images. Why, then, should the brain encode it? We propose that phase-disparity detectors help to work out which feature in the left eye corresponds to a given feature in the right. This correspondence problem is plagued by false matches: regions of the image that look similar, but do not correspond to the same object. We show that phase-disparity neurons tend to be more strongly activated by false matches. Thus, they may act as 'lie detectors', enabling the true correspondence to be deduced by a process of elimination. © 2007 Nature Publishing Group.
Author(s): Read JCA, Cumming BG
Publication type: Article
Publication status: Published
Journal: Nature Neuroscience
Year: 2007
Volume: 10
Issue: 10
Pages: 1322-1328
Print publication date: 01/10/2007
ISSN (print): 1097-6256
ISSN (electronic): 1546-1726
Publisher: Nature Publishing Group
URL: http://dx.doi.org/10.1038/nn1951
DOI: 10.1038/nn1951
PubMed id: 17828262
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