| Effect of transient versus sustained activation on interocular suppression. | |
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MedLine Citation:
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PMID: 18992272 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Switches in perceptual dominance resulting from either binocular rivalry or flash suppression likely involve some mechanism of interocular suppression, although it is unclear from past research whether different mechanisms are involved in the two cases. Using monocular, centrally fixated sinusoidal gratings surrounded by contiguous annuli of rivalrous gratings, suppression of the entire central grating was possible using either technique. However, the magnitude of the suppression was unaffected by the presence of an ipsilateral surround for flash suppression, yet, for binocular rivalry, suppression no longer occurred when the surrounds were fusible. Nevertheless, computational modeling demonstrates that the differences between the techniques may be attributable to the sustained versus transient stimulation of the contralateral surround, with the magnitude of the suppression proportional to the activation of the contralateral surround. Consistent with this, suppression extends over a greater distance at the onset of the contralateral surround than during sustained rivalry. Therefore, it is likely that perceptual dominance in both binocular rivalry and flash suppression is based on the same mechanism of interocular suppression. |
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Authors:
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David F Nichols; Hugh R Wilson |
Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't Date: 2008-11-22 |
Journal Detail:
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Title: Vision research Volume: 49 ISSN: 1878-5646 ISO Abbreviation: Vision Res. Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2008-12-08 Completed Date: 2009-02-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
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Languages: eng Pagination: 102-14 Citation Subset: IM |
Affiliation:
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Centre for Vision Research, 0009 Computer Science and Engineering Bldg., 4700 Keele St., York University, Toronto, Ont., Canada. dnichols@cvr.yorku.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Computer Simulation* Fixation, Ocular Humans Models, Psychological* Perceptual Masking / physiology* Photic Stimulation / methods Psychophysics Vision, Binocular Visual Perception / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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