| Motion-reversal reveals two motion mechanisms functioning in scotopic vision. | |
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MedLine Citation:
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PMID: 9156219 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We studied scotopic motion mechanisms, using a two-frame sinusoidal grating separated by various ISIs equated for mean luminance level. Perceived direction of displacement varied with both ISI and luminance. As luminance decreased, apparent motion reversal disappeared. This is predicted by a first-order motion model if the underlying temporal impulse response function varies from biphasic under photopic conditions to monophasic under scotopic conditions. Performance at long (but not short) ISIs depends upon stimulus contrast, suggesting there is also a scotopic feature-tracking mechanism. With isoluminant and high spatial frequency gratings, where the temporal impulse response function is monophasic, no motion reversal was observed. |
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Authors:
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T Takeuchi; K K De Valois |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Vision research Volume: 37 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 1997 Mar |
Date Detail:
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Created Date: 1997-06-26 Completed Date: 1997-06-26 Revised Date: 2007-11-14 |
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: 745-55 Citation Subset: IM; S |
Affiliation:
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Information Science Research Laboratory, NTT Basic Research Laboratories, Kanagawa, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Ocular Adult Contrast Sensitivity / physiology Differential Threshold Humans Lighting* Models, Neurological Motion Perception / physiology* Pattern Recognition, Visual / physiology |
| Grant Support | |
ID/Acronym/Agency:
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EY00014/EY/NEI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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