Document Detail

Contrast dependencies of two types of motion aftereffect.
MedLine Citation:
PMID:  9156199     Owner:  NLM     Status:  MEDLINE    
We examined the effects of adaptation and test contrasts on the duration of two types of motion aftereffect (MAE) that presumably reveal different levels of motion processing: MAE with a static test stimulus (static MAE), and that with a counterphasing test stimulus (flicker MAE). MAE duration increased with increasing adaptation contrast. When the test contrast was low, it increased rapidly, and saturated at a low adaptation contrast. When the test contrast was high, however, it gradually increased over a wide range of adaptation contrasts. These complex effects of stimulus contrasts could be well described by a dependency on adaptation contrast normalized by test contrast on a logarithmic axis. Little difference was found between the results for two types of MAE. The interaction between adaptation and test contrasts leads us to reject the idea that the shape of adaptation contrast dependency of MAE duration reflects that of the sensitivity function of motion detecting mechanisms. The results also suggest a functional similarity between the processes underlying static and flicker MAEs with regard to their responses to contrasts.
S Nishida; H Ashida; T Sato
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  37     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1997 Mar 
Date Detail:
Created Date:  1997-06-25     Completed Date:  1997-06-25     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  553-63     Citation Subset:  IM; S    
Information Science Research Laboratory, NTT Basic Research Laboratories, Kanagawa, Japan.
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MeSH Terms
Adaptation, Physiological
Contrast Sensitivity / physiology*
Figural Aftereffect / physiology*
Motion Perception / physiology*

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