Document Detail


The effect of knee joint angle on torque control.
MedLine Citation:
PMID:  19906637     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of the author's investigation was to examine the effect of knee joint angle on torque control of the quadriceps muscle group. In all, 12 healthy adults produced maximal voluntary contractions and submaximal torque (15, 30, and 45% MVC [maximal voluntary contraction]) at leg flexion angles of 15 degrees , 30 degrees , 60 degrees , and 90 degrees below the horizontal plane. As expected, MVC values changed with respect to joint angle with maximum torque output being greatest at 60 degrees and least at 15 degrees . During the submaximal tasks, participants appropriately scaled their torque output to the required targets. Absolute variability (i.e., standard deviation) of torque output was greatest at 60 degrees and 90 degrees knee flexion. However, relative variability as indexed by coefficient of variation (CV) decreased as joint angle increased, with the greatest CV occurring at 15 degrees . These results are congruent with the hypothesis that joint angle influences the control of torque.
Authors:
Jacob J Sosnoff; Stefani J Voudrie; Kyle T Ebersole
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of motor behavior     Volume:  42     ISSN:  1940-1027     ISO Abbreviation:  J Mot Behav     Publication Date:    2010 Jan-Feb
Date Detail:
Created Date:  2010-01-06     Completed Date:  2010-03-30     Revised Date:  2010-05-13    
Medline Journal Info:
Nlm Unique ID:  0236512     Medline TA:  J Mot Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5-10     Citation Subset:  IM    
Affiliation:
Motor Control Laboratory, Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. jsosnoff@illinois.edu
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MeSH Terms
Descriptor/Qualifier:
Female
Humans
Knee Joint / physiology*
Male
Muscle Contraction / physiology
Quadriceps Muscle / physiology*
Torque*
Young Adult

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


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