| Local stability in coordinated rhythmic movements: fluctuations and relaxation times. | |
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MedLine Citation:
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PMID: 11983433 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An experiment was conducted to examine the stability of the anti-phase and in-phase modes of coordination by means of both fluctuations and relaxation times. Participants (n=6) performed a rhythmic bimanual forearm coordination task that required them to oscillate their forearms in-phase and anti-phase while grasping two manipulanda at fixed frequencies ranging from 0.6 to 1.8 Hz. Relaxation times were measured as the time taken to return to a stable mode following the application of a transient mechanical torque. It was found that relaxation times were not different statistically across participants, frequencies, and coordinative modes. However, fluctuations, as indicated by the mean S.D. of relative phase across individual frequency plateaus, were significantly greater in the anti-phase than in the in-phase mode of coordination, p<0.05. Whilst providing new empirical support for the notion that relaxation times should be of the same order of magnitude at frequencies outside transition regions, the findings suggest that the level of stochastic noise in the anti-phase mode is greater than that of the in-phase mode. Implications are made for the future assessment of local pattern stability. |
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Authors:
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M L J Court; S J Bennett; A M Williams; K Davids |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Human movement science Volume: 21 ISSN: 0167-9457 ISO Abbreviation: Hum Mov Sci Publication Date: 2002 Apr |
Date Detail:
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Created Date: 2002-05-01 Completed Date: 2002-08-19 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8300127 Medline TA: Hum Mov Sci Country: Netherlands |
Other Details:
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Languages: eng Pagination: 39-60 Citation Subset: IM |
Affiliation:
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School of Human Sciences, Research Institute for Sport and Exercise Sciences, Henry Cotton Campus, Liverpool John Moores University, UK. hhsmcour@livjm.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Attention* Female Functional Laterality* Humans Individuality Male Muscle Relaxation* Psychomotor Performance* Stochastic Processes Time Perception* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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