Document Detail

Paucity of chromatic linear motion detectors in macaque V1.
MedLine Citation:
PMID:  16097865     Owner:  NLM     Status:  MEDLINE    
The motion of a color-defined edge is often more difficult to perceive than the motion of a luminance-defined edge. Neurons subserving motion vision may therefore be particularly sensitive to luminance contrast. One class of neurons thought to play a critical role in motion perception is V1 neurons whose spatiotemporal receptive fields are oriented in space-time. We used the reverse correlation technique to study the relationship between color tuning and space-time receptive field orientation in V1 neurons of awake, fixating monkeys. Neurons with space-time oriented receptive fields were tuned almost exclusively for luminance, whereas neurons with nonoriented space-time receptive fields were tuned for luminance or for color. These results suggest that the special role of luminance contrast in motion perception is due in part to the establishment of space-time oriented receptive fields among luminance-tuned, but not color-tuned, V1 neurons.
Gregory D Horwitz; Thomas D Albright
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-06-17
Journal Detail:
Title:  Journal of vision     Volume:  5     ISSN:  1534-7362     ISO Abbreviation:  J Vis     Publication Date:  2005  
Date Detail:
Created Date:  2005-08-15     Completed Date:  2006-01-27     Revised Date:  2008-04-29    
Medline Journal Info:
Nlm Unique ID:  101147197     Medline TA:  J Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  525-33     Citation Subset:  IM    
Vision Center Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA.
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MeSH Terms
Color Perception / physiology*
Macaca / physiology*
Motion Perception / physiology*
Neurons / physiology*
Visual Cortex / cytology,  physiology*
Visual Pathways / physiology

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