Caloric vestibular stimulation reveals discrete neural mechanisms for coherence rivalry and eye rivalry: A meta-rivalry model

Ngo, Trung T., Liu, Guang B., Tilley, Andrew J., Pettigrew, John D. and Miller, Steven M. (2007) Caloric vestibular stimulation reveals discrete neural mechanisms for coherence rivalry and eye rivalry: A meta-rivalry model. Vision Research, 47 21: 2685-2699.


Author Ngo, Trung T.
Liu, Guang B.
Tilley, Andrew J.
Pettigrew, John D.
Miller, Steven M.
Title Caloric vestibular stimulation reveals discrete neural mechanisms for coherence rivalry and eye rivalry: A meta-rivalry model
Journal name Vision Research   Check publisher's open access policy
ISSN 0042-6989
Publication date 2007-09
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1016/j.visres.2007.03.024
Volume 47
Issue 21
Start page 2685
End page 2699
Total pages 15
Place of publication Oxford
Publisher Pergamon-elsevier Science Ltd
Collection year 2008
Language eng
Subject C1
320705 Sensory Systems
730111 Hearing, vision, speech and their disorders
Abstract Binocular rivalry is an extraordinary visual phenomenon that has engaged investigators for centuries. Since its first report, there has been vigorous debate over how the brain achieves the perceptual alternations that occur when conflicting images are presented simultaneously, one to each eye. Opposing high-level/stimulus-representation models and low-level/eye-based models have been proposed to explain the phenomenon, recently merging into an amalgam view. Here, we provide evidence that during viewing of Diaz-Caneja stimuli, coherence rivalry-in which aspects of each eye's presented image are perceptually regrouped into rivalling coherent images-and eye rivalry operate via discrete neural mechanisms. We demonstrate that high-level brain activation by unilateral caloric vestibular stimulation shifts the predominance of perceived coherent images (coherence rivalry) but not half-field images (eye rivalry). This finding suggests that coherence rivalry (like conventional rivalry according to our previous studies) is mediated by interhemispheric switching at a high level, while eye rivalry is mediated by intrahemispheric mechanisms, most likely at a low level. Based on the present data, we further propose that Diaz-Caneja stimuli induce 'meta-rivalry' whereby the discrete high- and low-level competitive processes themselves rival for visual consciousness. (C) 2007 Elsevier Ltd. All rights reserved.
Keyword Neurosciences
Ophthalmology
binocular rivalry
bottom-up versus top-down processing
amalgam view
interocular grouping
multistability
coherence rivalry
caloric vestibular stimulation
interhemispheric switching
meta-rivalry
visual consciousness
Lateral Geniculate-nucleus
Naso-temporal Division
Primary Visual-cortex
Binocular-rivalry
Perceptual Rivalry
Spatial Neglect
Stochastic Properties
Unilateral Neglect
Anterior Cingulate
Sunnybrook Stroke
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Journal Article Import (ISI/CVs)
Excellence in Research Australia (ERA) - Collection
2008 Higher Education Research Data Collection
School of Biomedical Sciences Publications
 
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Created: Mon, 18 Feb 2008, 15:29:33 EST