Document Detail

The timing of color and location processing in the motor context.
MedLine Citation:
PMID:  9746133     Owner:  NLM     Status:  MEDLINE    
In this study, the use of color and location as stimulus attributes manipulated during a simple action was aimed at comparing how dorsal (location) and ventral (color) features are integrated in action and the timing of their processing. Eighteen subjects were presented with a green dot on a computer screen, which they were required to point at and touch. In 20% of the trials, the location or the color of the target was altered at the onset of movement to this stimulus, requiring the participant to modify the initially programmed response according to specific motor instructions. In the 'location-go' group, the target changed in location and participants were instructed to reach the displaced stimulus by correcting their ongoing movement. In the 'location-stop' and 'color-stop' groups, subjects were instructed to interrupt their movement when the target changed location or color, respectively. Results showed that the latency of the first responses to the perturbation clearly depended on the stimulus attribute and not on the motor instruction tested: the response to color change was obtained about 80 ms later than both conditions involving location change. It is concluded that: (1) color processing is slower than location processing, and (2) the first reactions to the location change occur after the same delay irrespective of the response required from the subject.
L Pisella; M Arzi; Y Rossetti
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Experimental brain research     Volume:  121     ISSN:  0014-4819     ISO Abbreviation:  Exp Brain Res     Publication Date:  1998 Aug 
Date Detail:
Created Date:  1998-11-23     Completed Date:  1998-11-23     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  270-6     Citation Subset:  IM; S    
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MeSH Terms
Color Perception / physiology*
Fingers / physiology
Middle Aged
Motor Cortex / physiology*
Movement / physiology
Psychomotor Performance / physiology*
Reaction Time / physiology
Space Perception / physiology*
Visual Fields / physiology*

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