Document Detail


Practice effects on local and global dynamics of the ski-simulator task.
MedLine Citation:
PMID:  16284754     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This experiment examined the acquisition of the global and local dynamics of the changes in the total body center of mass-platform and inter-limb coordination motions over the course of practice (20, 30 s trials each day for 7 days) in the ski-simulator task. Four blocks of trials, representative of early, moderate, and extensive practice were analyzed through power spectrum and coherence analyses. The oscillation frequencies of the knee joints became tuned to that of the platform-performer system and there were changes due to practice in the lower inter-limb coordination dynamics independent of the center of mass and platform coordination pattern. Acquisition of global level dynamics occurs to achieve a stable task solution that can allow for degenerate frequency- and phase-locking of the mechanical degrees of freedom at both the local intra- and inter-limb levels.
Authors:
S L Hong; K M Newell
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Publication Detail:
Type:  Journal Article     Date:  2005-11-12
Journal Detail:
Title:  Experimental brain research     Volume:  169     ISSN:  0014-4819     ISO Abbreviation:  Exp Brain Res     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-02-21     Completed Date:  2008-01-04     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  350-60     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Analysis of Variance
Biomechanical Phenomena
Computer Simulation
Female
Humans
Knee Joint / physiology
Male
Motor Skills / physiology*
Nonlinear Dynamics*
Postural Balance / physiology*
Practice (Psychology)*
Skiing / education*,  physiology
Spectrum Analysis

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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