Document Detail


Macroscopic and histological observations on the human sternoclavicular joint disc.
MedLine Citation:
PMID:  19221859     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To know the detailed morphology of the human sternoclavicular joint and its articular disc is essential to understanding the movement of this joint and the functional role of the disc. In the present study, 51 articular discs of the sternoclavicular joint of 29 Japanese cadavers were macroscopically examined and then embedded in paraffin to make a complete series of coronal sections for light microscopic observation. We classified the articular discs into three types, discoid, ring, and meniscoid. The discoid-type disc was flattened and round in shape, whereas the other two types had partial defects in the centers (ring type) or in the periphery (meniscoid type). We found the bony process that protruded from the sternal end of the clavicle and fitted into the defect part of the ring- or meniscoid-type discs. The mean values of this bony process of the clavicle adjacent to the articular disc were 2.1, 4.7, and 6.0 mm, respectively, in the three types of articular disc. The movement between the articular disc and the clavicle may be limited, because the articular disc was directly attached to the clavicle on its medial region. The present histological observation demonstrated that the sternal side of the disc was composed of fibrocartilage and dense connective tissue. The clavicular side of the disc was composed of only fibrocartilage. The clavicular side of the articular disc of the sternoclavicular joint has the function of resisting the compressive load to the clavicular surface.
Authors:
Kenji Emura; Takamitsu Arakawa; Toshio Terashima; Akinori Miki
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Publication Detail:
Type:  Journal Article     Date:  2009-02-17
Journal Detail:
Title:  Anatomical science international     Volume:  84     ISSN:  1447-073X     ISO Abbreviation:  Anat Sci Int     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-08-19     Completed Date:  2010-01-11     Revised Date:  2011-02-08    
Medline Journal Info:
Nlm Unique ID:  101154140     Medline TA:  Anat Sci Int     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  182-8     Citation Subset:  IM    
Affiliation:
Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, 654-0142, Japan.
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MeSH Terms
Descriptor/Qualifier:
Aged
Aged, 80 and over
Clavicle / anatomy & histology
Female
Fibrocartilage / anatomy & histology
Humans
Male
Sternoclavicular Joint / anatomy & histology*,  physiology

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