| Surround motion silences signals from same-direction motion. | |
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MedLine Citation:
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PMID: 19726727 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The response of motion-sensitive neurons to stimuli presented within their receptive field is often affected by stimulation in the surrounding region. These effects have perceptually relevant consequences that can be measured using behavioral techniques. We used psychophysical reverse correlation to characterize directional selectivity in human observers while they processed a local motion stimulus and studied the effect of adding an additional motion signal in the surrounding region. The surround had no effect on response gain for signals of opposite direction but selectively reduced gain for those of same direction. Surprisingly this reduction was close to 100%, effectively amounting to a gating process whereby signals of same direction were completely silenced. Our data indicate that by far the most prominent perceptual manifestation of center-surround antagonism is gain suppression by motion in the same direction without any appreciable change in directional tuning. |
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Authors:
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Peter Neri; Dennis Levi |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't Date: 2009-09-02 |
Journal Detail:
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Title: Journal of neurophysiology Volume: 102 ISSN: 1522-1598 ISO Abbreviation: J. Neurophysiol. Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-11-05 Completed Date: 2010-01-25 Revised Date: 2010-11-02 |
Medline Journal Info:
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Nlm Unique ID: 0375404 Medline TA: J Neurophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 2594-602 Citation Subset: IM |
Affiliation:
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Institute of Medical Sciences, Aberdeen Medical School, Aberdeen, United Kingdom. peter.neri@abdn.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Choice Behavior
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physiology Contrast Sensitivity / physiology Humans Inhibition (Psychology) Models, Neurological Motion Perception / physiology* Neuropsychological Tests Orientation / physiology* Photic Stimulation / methods Psychophysics Space Perception / physiology* Time Factors Visual Fields / physiology* Visual Pathways / physiology |
| Grant Support | |
ID/Acronym/Agency:
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R01EY-0178/EY/NEI NIH HHS; //Medical Research Council |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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