| The influence of fascicle behavior on the lack of velocity dependence in eccentric joint torque in humans: in vivo observation. | |
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MedLine Citation:
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PMID: 19483255 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To investigate the relationship between fascicle behavior and joint torque, the fascicle behavior of the triceps surae during isometric and eccentric (30 and 60 deg/s) plantar flexion by maximal voluntary and submaximal electrical activation (MVA and SEA) was measured by realtime ultrasonography. Eccentric torque at 30 and 60 deg/s was significantly higher than isometric torque under SEA, but not under MVA. However, fascicle length did not significantly differ between isometric and eccentric trials under either condition. Therefore, the difference in developed torque by MVA and SEA cannot be explained by fascicle behavior. Under both MVA and SEA conditions, eccentric torque at 30 and 60 deg/s was equivalent. Similarly, fascicle lengthening velocities at 30 and 60deg/s did not show any significant difference. Such fascicle behavior can be attributed to the influence of tendinous tissue and pennation angle, and lead to a lack of increase in eccentric torque with increasing angular velocity. |
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Authors:
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Kentaro Chino; Naotoshi Mitsukawa; Kai Kobayashi; Yusuke Miyoshi; Toshiaki Oda; Hiroaki Kanehisa; Tetsuo Fukunaga; Senshi Fukashiro; Yasuo Kawakami |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of applied biomechanics Volume: 25 ISSN: 1065-8483 ISO Abbreviation: J Appl Biomech Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-06-01 Completed Date: 2009-06-24 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9315240 Medline TA: J Appl Biomech Country: United States |
Other Details:
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Languages: eng Pagination: 111-8 Citation Subset: IM |
Affiliation:
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Japan Institute of Sports Sciences, Tokyo, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Ankle Joint
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physiology* Computer Simulation Humans Male Models, Biological* Movement / physiology* Muscle Contraction / physiology* Muscle Fibers, Skeletal / physiology* Muscle, Skeletal / physiology* Torque Young Adult |
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