Document Detail


Anticipatory covariation of finger forces during self-paced and reaction time force production.
MedLine Citation:
PMID:  15882796     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We tested a hypothesis that humans can change patterns of finger force covariation in a task-specific manner in preparation to a change in the total force. Subjects performed quick targeted force pulses by pressing with four fingers on force sensors from a certain background force level to a target level. In self-paced trials, finger force modes (hypothetical commands to fingers) showed changes in covariation, computed across trials, more than 100 ms before changes in the total force. Half of the subjects showed large early changes in force mode covariation, while in the other half these changes were much smaller and were followed by a larger positive covariation of finger modes potentially destabilizing the total force profile. Such early covariation changes were absent under the simple reaction time instruction. We conclude that anticipatory covariation reflects control processes that can be expressed differently in different persons and modified depending on the available time for action preparation.
Authors:
Halla Olafsdottir; Naoki Yoshida; Vladimir M Zatsiorsky; Mark L Latash
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, P.H.S.     Date:  2005-02-25
Journal Detail:
Title:  Neuroscience letters     Volume:  381     ISSN:  0304-3940     ISO Abbreviation:  Neurosci. Lett.     Publication Date:    2005 Jun 10-17
Date Detail:
Created Date:  2005-05-10     Completed Date:  2005-08-09     Revised Date:  2014-09-11    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  92-6     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Cues*
Female
Fingers / pathology*
Humans
Male
Muscle, Skeletal / physiology*
Postural Balance / physiology*
Psychomotor Performance / physiology*
Reaction Time / physiology*
Stress, Mechanical
Task Performance and Analysis
Volition / physiology
Grant Support
ID/Acronym/Agency:
AG-018751/AG/NIA NIH HHS; AR-048563/AR/NIAMS NIH HHS; NS-35032/NS/NINDS NIH HHS; R01 AR048563/AR/NIAMS NIH HHS; R01 AR048563-03/AR/NIAMS NIH HHS; R01 AR048563-04/AR/NIAMS NIH HHS
Comments/Corrections

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