| The effect of overall stimulus velocity on motion parallax. | |
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MedLine Citation:
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PMID: 18282306 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined the effectiveness with which motion parallax information can be utilized by rhesus monkeys for depth perception. A visual display comprised of random-dots that mimicked a rigid, three-dimensional object rocking back and forth was used. Differential depth was produced by presenting sub-regions of the dots moving at different velocities from the rest of dots in the display. The tasks for the monkeys were to detect or discriminate a target region that was protruding the furthest from the background plane. To understand the role of stimulus movement, we examined the accuracy and the rapidity of the saccadic responses as a function of rocking velocity of the entire three-dimensional object. The results showed that performance accuracy improved and reaction times decreased with increasing rocking velocities. The monkeys can process the motion parallax information with remarkable rapidity such that the average reaction time ranged between 212 and 246 milliseconds. The data collected suggest that the successive activation of just two sets of cones is sufficient to perform the task. |
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Authors:
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Ying Zhang; Peter H Schiller |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: Visual neuroscience Volume: 25 ISSN: 0952-5238 ISO Abbreviation: Vis. Neurosci. Publication Date: 2008 Jan-Feb |
Date Detail:
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Created Date: 2008-02-19 Completed Date: 2008-07-02 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8809466 Medline TA: Vis Neurosci Country: England |
Other Details:
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Languages: eng Pagination: 3-15 Citation Subset: IM |
Affiliation:
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Department of Brain and Cognitive Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. yzhang00@mit.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Depth Perception / physiology* Discrimination (Psychology) / physiology Macaca mulatta Motion Perception / physiology* Pattern Recognition, Visual / physiology* Photic Stimulation Psychophysics Reaction Time Saccades / physiology Time Factors |
| Grant Support | |
ID/Acronym/Agency:
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F32-EY014750/EY/NEI NIH HHS; R01-EY08502/EY/NEI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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