Document Detail


The effect of ankle constraint on the torsional laxity of the knee during internal-external rotation of the foot.
MedLine Citation:
PMID:  1880136     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The in vivo torsional laxity and stiffness of the knee joint are usually determined by rotating the foot and measuring the torque generated at the knee. However, when rotation is applied to the foot, significant three-dimensional forces and moments are produced at the knee. These forces and moments depend upon the external constraint of the ankle complex, and as a result, the observed laxity of the knee also depends on the ankle constraint. Tests are conducted with the foot of a subject in a shoe, with and without the ankle taped, and in a buckled and unbuckled (ski) boot that can effectively constrain ankle rotation. The average laxity of the primary (linear) region of the axial moment vs internal-external rotation is 30% greater when the ankle is constrained by the buckled boot than it is in three other cases of lesser ankle constraint.
Authors:
T P Quinn; C D Mote; H B Skinner
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of biomechanics     Volume:  24     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  1991  
Date Detail:
Created Date:  1991-10-02     Completed Date:  1991-10-02     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  511-25     Citation Subset:  IM    
Affiliation:
Department of Mechanical Engineering, University of California, Berkeley, 94720.
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MeSH Terms
Descriptor/Qualifier:
Adult
Ankle Joint / physiology*
Biomechanics
Electromyography
Foot / physiology*
Humans
Joint Instability / physiopathology*
Knee Joint / physiopathology*
Middle Aged
Movement / physiology
Reference Values
Reproducibility of Results
Rotation
Torsion Abnormality

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


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