Document Detail

Purely chromatic perception of motion in depth: two eyes as sensitive as one.
MedLine Citation:
PMID:  2011453     Owner:  NLM     Status:  MEDLINE    
Motion hyperacuity (phase) thresholds were measured for both lateral and stereoscopic oscillatory motion in both luminance and equiluminant red/green gratings of 2 cycles per degree. Thresholds for lateral chromatic motion did not exhibit the inhibitory fall-off at low temporal frequencies that was found for luminance motion. Phase thresholds for purely chromatic motion were substantially higher than those for luminance gratings, in proportion to the ratio of cone signal modulation, but they could be predicted from the corresponding contrast sensitivities for both types of stimulus. Stereomovement thresholds in luminance gratings showed the stereomovement suppression effect relative to monocular motion sensitivity previously reported for line stimuli, but purely chromatic gratings did not. Together with the lack of an inhibitory fall-off, these results imply that chromatic and luminance motion are processed by different neural pathways, and that the chrominance pathway is capable of supporting a strong percept of stereoscopic motion from purely chromatic gratings.
C W Tyler; P Cavanagh
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Perception & psychophysics     Volume:  49     ISSN:  0031-5117     ISO Abbreviation:  Percept Psychophys     Publication Date:  1991 Jan 
Date Detail:
Created Date:  1991-05-08     Completed Date:  1991-05-08     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0200445     Medline TA:  Percept Psychophys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  53-61     Citation Subset:  C    
Smith-Kettlewell Eye Research Institute, San Francisco, CA 94115.
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MeSH Terms
Color Perception*
Depth Perception*
Motion Perception*
Sensory Thresholds
Vision, Monocular*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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