| Alteration of the position sense at the ankle induced by muscular fatigue in humans. | |
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MedLine Citation:
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PMID: 11782656 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The purpose of this study was to investigate how an isometric exhaustion test affects the position sense at the ankle using an active matching task. METHODS: Eight male subjects with a mean age 24.6 yr participated in the study. Subjects' ability to match the right ankle with the position of the left reference ankle position-determined using signed and absolute errors and variability-was investigated. This task was realized for four ankle angular values (in degrees), two in dorsiflexion (P(-20), P(-10)) and two in plantarflexion (P(20), P(10)) and for two experimental conditions: 1) normal and 2) fatigue. Muscular fatigue was induced in tibialis anterior (TA) of the right leg (ankle dorsiflexor) by using an isometric test. Subjects were instructed to maintain a workload of 70% of their maximal voluntary contraction in series of 40 s. RESULTS: With fatigue, subjects produced ankle movements characterized by greater absolute errors for movements of large amplitude in dorsiflexion and for movements of small amplitude in plantarflexion. In addition, using a "worst-case scenario" analysis, results showed that errors were significantly greater than the normal functioning range for 20 degrees dorsiflexion and 10 degrees plantarflexion positioning. CONCLUSIONS: The acuity of the position sense at the ankle is reduced subsequent to a fatigue protocol. The influence and the potential deleterious effects of muscular fatigue on position sense are discussed. |
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Authors:
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Nicholas Forestier; Normand Teasdale; Vincent Nougier |
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Publication Detail:
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Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 34 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2002 Jan |
Date Detail:
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Created Date: 2002-01-09 Completed Date: 2002-02-19 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 117-22 Citation Subset: IM; S |
Affiliation:
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Division de kinésiologie, Université Laval, Québec, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Ankle Joint / physiology* Electromyography Feedback / physiology Functional Laterality Humans Isometric Contraction / physiology Male Muscle Fatigue / physiology* Muscle, Skeletal / physiology* Proprioception / physiology* Psychomotor Performance / physiology* Task Performance and Analysis |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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