Document Detail

Parameter precuing and motor preparation.
MedLine Citation:
PMID:  11500576     Owner:  NLM     Status:  MEDLINE    
A movement task was used to investigate the effects of precued variables on reaction time. The task involved rapid rotation of a hand-held manipulandum to target locations and required either pronation or supination of the forearm through short or long extent. The effects on reaction time of precues signalling target direction, extent, or a combination of direction and extent, were measured. The longest reaction times occurred when no information about direction or extent was provided in the precue (all parameters uncertain). Complete prior specification of target position produced the shortest reaction times. Specification of direction when extent was uncertain produced a significantly larger reduction in reaction time than specification of extent when direction was uncertain. Prior specification of extent also produced a small but significant reduction in reaction time relative to the condition in which direction and extent were specified in a mutually conditional manner. The results are discussed in relation to parameter precuing and motor programming, in which the direction is programmed by the pre-selection of neurons representing the muscles to be used in the task while programming of extent is represented by their level of activity during task performance.
J G Anson; B I Hyland; R Kötter; J R Wickens
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Motor control     Volume:  4     ISSN:  1087-1640     ISO Abbreviation:  Motor Control     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2001-08-13     Completed Date:  2001-08-30     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9706297     Medline TA:  Motor Control     Country:  United States    
Other Details:
Languages:  eng     Pagination:  221-31     Citation Subset:  IM    
Kinesiology Section, School of Physical Education, University of Otago, P. O. Box 56, Dunedin, New Zealand.
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MeSH Terms
Acoustic Stimulation
Middle Aged
Psychomotor Performance*
Reaction Time*

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