Eye rivalry and object rivalry in the intact and split-brain

Ritchie, Kay L. and Bannerman, Rachel L. and Turk, David J. and Sahraie, Arash (2013) Eye rivalry and object rivalry in the intact and split-brain. Vision Research, 91 . pp. 102-107. ISSN 0042-6989

Full content URL: http://dx.doi.org/10.1016/j.visres.2013.08.004

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Item Type:Article
Item Status:Live Archive

Abstract

Both the eye of origin and the images themselves have been found to rival during binocular rivalry. We
presented traditional binocular rivalry stimuli (face to one eye, house to the other) and Diaz-Caneja stimuli
(half of each image to each eye) centrally to both a split-brain participant and a control group. With
traditional rivalry stimuli both the split-brain participant and age-matched controls perceived more
coherent percepts (synchronised across the hemifields) than non-synchrony, but our split-brain participant
perceived more non-synchrony than our controls. For rival stimuli in the Diaz-Caneja presentation
condition, object rivalry gave way to eye rivalry with all participants reporting more non-synchrony than
coherent percepts. We have shown that splitting the stimuli across the hemifields between the eyes leads
to greater eye than object rivalry, but that when traditional rival stimuli are split as the result of the severed
corpus callosum, traditional rivalry persists but to a lesser extent than in the intact brain. These
results suggest that communication between the early visual areas is not essential for synchrony in traditional
rivalry stimuli, and that other routes for interhemispheric interactions such as subcortical connections
may mediate rivalry in a traditional binocular rivalry condition.

Keywords:split brain, binocular vision
Subjects:C Biological Sciences > C800 Psychology
C Biological Sciences > C830 Experimental Psychology
C Biological Sciences > C860 Neuropsychology
Divisions:College of Social Science > School of Psychology
ID Code:24065
Deposited On:13 Sep 2016 12:20

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