| Anticipatory covariation of finger forces during self-paced and reaction time force production. | |
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MedLine Citation:
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PMID: 15882796 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Halla Olafsdottir; Naoki Yoshida; Vladimir M Zatsiorsky; Mark L Latash |
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Publication Detail:
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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:
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Title: Neuroscience letters Volume: 381 ISSN: 0304-3940 ISO Abbreviation: Neurosci. Lett. Publication Date: 2005 Jun 10-17 |
Date Detail:
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Created Date: 2005-05-10 Completed Date: 2005-08-09 Revised Date: 2011-11-10 |
Medline Journal Info:
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Nlm Unique ID: 7600130 Medline TA: Neurosci Lett Country: Ireland |
Other Details:
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Languages: eng Pagination: 92-6 Citation Subset: IM |
Affiliation:
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Department of Kinesiology, Rec.Hall-267, The Pennsylvania State University, University Park, PA 16802, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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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:
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AG-018751/AG/NIA NIH HHS; AR-048563/AR/NIAMS NIH HHS; NS-35032/NS/NINDS NIH HHS; R01 AR048563-03/AR/NIAMS NIH HHS; R01 AR048563-04/AR/NIAMS NIH HHS |
| Comments/Corrections | |
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