Document Detail

The restraining function of the cruciate ligaments on hyperextension and hyperflexion of the human knee joint.
MedLine Citation:
PMID:  1867405     Owner:  NLM     Status:  MEDLINE    
Each of the cruciate ligaments contains functionally different fiber groups; one fiber bundle is always taut; numerous others are taut in intermediate or extreme positions. The bulk of the fibers of the anterior cruciate ligament (ACL) is taut in maximal extension, while that of the posterior cruciate ligament (PCL) is taut in the intermediate positions and in maximal flexion. Fibers taut in extreme positions serve as restraints: during hyperextension, the ACL restrains forward migration of its tibial attachment, while the PCL interacts with other structures to prevent posterior opening of the joint. The inverse situation occurs in hyperflexion. Cruciate fibers are dissimilar in length and angular arrangement so that, when movements are restrained, they lengthen to different extents. To define this phenomenon in quantitative terms, the term isokolyons was coined for lines from which fibers showing identical elongation in percentage on exposure to a force take their origin.
F K Fuss
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Anatomical record     Volume:  230     ISSN:  0003-276X     ISO Abbreviation:  Anat. Rec.     Publication Date:  1991 Jun 
Date Detail:
Created Date:  1991-09-09     Completed Date:  1991-09-09     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370540     Medline TA:  Anat Rec     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  283-9     Citation Subset:  IM    
Institute of Anatomy (1st Department) of University of Vienna, Austria.
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MeSH Terms
Anterior Cruciate Ligament / anatomy & histology,  physiology*
Knee Joint / anatomy & histology,  physiology*
Movement / physiology
Posterior Cruciate Ligament / anatomy & histology,  physiology*

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