Document Detail

Responses of complex cells in area 17 of the cat to bi-vectorial transparent motion.
MedLine Citation:
PMID:  8917784     Owner:  NLM     Status:  MEDLINE    
We examined the responses to transparent motion of complex cells in cat area 17 which show directional selectivity to moving random pixel arrays (RPAs). The response to an RPA moving in the cell's preferred direction is inhibited when a second RPA is transparently moving in another direction. The inhibition by the second pattern is quantified as a function of its direction. The response to a pattern moving in the preferred direction is never completely suppressed, not even when a second pattern is moving transparently in the opposite direction. To the extent that supra-spontaneous firing rates signal the presence of the optimal velocity vector, these cells therefore still signal the presence of this line-label stimulus despite additional opposing, or otherwise directed, motion components. The results confirm previous suggestions that, for the computation of motion energy in cat area 17 complex cells, a full opponent stage is not plausible. Furthermore, we show that the response to a combination of two motion vectors can be predicted by the average of the responses to the individual components.
R J van Wezel; M J Lankheet; F A Verstraten; A F Maree; W A van de Grind
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  36     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1996 Sep 
Date Detail:
Created Date:  1996-12-11     Completed Date:  1996-12-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  2805-13     Citation Subset:  IM; S    
Helmholtz Institute, Utrecht, The Netherlands.
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MeSH Terms
Motion Perception / physiology*
Neural Inhibition
Pattern Recognition, Visual / physiology
Stereotaxic Techniques
Visual Cortex / physiology*

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

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