Document Detail

Effect of contrast on the perception of moving multiple Gabor patterns.
MedLine Citation:
PMID:  9893816     Owner:  NLM     Status:  MEDLINE    
The present study examined the way in which the perception of motion coherency depends on luminance contrast. Pseudo-plaid patterns were presented to subjects who judged whether coherent motion or component motion of the Gabor patterns was perceived. Michelson contrast, eccentricity, spatial separation, and angular separation between two groups of Gabor patches were varied systematically. When the contrast was high, coherent motion perception was dominant in peripheral viewing but not in foveal viewing. When the contrast was low, coherent motion was perceived at all eccentricities. Under low-contrast conditions and with peripheral viewing, coherent motion was perceived over broader spatial areas and at wider angular separations. The contrast dependency of motion coherency can be qualitatively explained in terms of the relative activity of hypothetical local-motion units in area V1 and global-motion units in area MT of the visual cortex.
T Takeuchi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  38     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1998 Oct 
Date Detail:
Created Date:  1999-02-08     Completed Date:  1999-02-08     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  3069-82     Citation Subset:  IM; S    
Information Science Research Laboratory, NTT Basic Research Laboratories, Kanagawa, Japan.
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MeSH Terms
Contrast Sensitivity / physiology*
Fovea Centralis / physiology
Motion Perception / physiology*
Pattern Recognition, Visual / physiology*
Visual Cortex / physiology
Visual Fields

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