An anatomic study on the origin of the long head of the triceps brachii.
Long head of the triceps brachii
anatomy
glenohumeral joint capsule
glenoid labrum
infraglenoid tubercle
origin
Journal
JSES open access
ISSN: 2468-6026
Titre abrégé: JSES Open Access
Pays: Netherlands
ID NLM: 101738952
Informations de publication
Date de publication:
Mar 2019
Mar 2019
Historique:
entrez:
13
4
2019
pubmed:
13
4
2019
medline:
13
4
2019
Statut:
epublish
Résumé
Posterior shoulder instability was reported to be more common than had been previously reported. However, the detailed morphology of the origin of the long head of the triceps brachii (LHT), which is located at the posteroinferior part of the glenohumeral joint and associated with the stability of the head of the humerus, has been unknown. The purpose of the current study was to clarify the detailed morphology of the origin of the LHT. A total of 64 specimens from 36 cadavers (11 males and 25 females) were used. After dissecting the origin of the LHT in 54 specimens of 27 cadavers, the width of the origin of the LHT was measured with a caliper by 2 observers. The origin of the LHT was also investigated histologically in 18 specimens. Sections were analyzed with Masson's trichrome staining and Safranin O staining. Some fibers of the LHT originated more from the cranial area than from the infraglenoid tubercle and descended along the posterior rim of the glenoid cavity. The width of the origin on the dorsal surface of the scapula was 31.2 mm. The origin from the bone had a developed uncalcified fibrocartilage histologically. In addition, the LHT was fused with the glenohumeral joint capsule and was attached to the glenoid labrum directly. The LHT could affect the glenohumeral joint capsule or the glenoid labrum because of their connections to each other and be associated with the posterior shoulder instability indirectly.
Sections du résumé
BACKGROUND
BACKGROUND
Posterior shoulder instability was reported to be more common than had been previously reported. However, the detailed morphology of the origin of the long head of the triceps brachii (LHT), which is located at the posteroinferior part of the glenohumeral joint and associated with the stability of the head of the humerus, has been unknown. The purpose of the current study was to clarify the detailed morphology of the origin of the LHT.
METHODS
METHODS
A total of 64 specimens from 36 cadavers (11 males and 25 females) were used. After dissecting the origin of the LHT in 54 specimens of 27 cadavers, the width of the origin of the LHT was measured with a caliper by 2 observers. The origin of the LHT was also investigated histologically in 18 specimens. Sections were analyzed with Masson's trichrome staining and Safranin O staining.
RESULTS
RESULTS
Some fibers of the LHT originated more from the cranial area than from the infraglenoid tubercle and descended along the posterior rim of the glenoid cavity. The width of the origin on the dorsal surface of the scapula was 31.2 mm. The origin from the bone had a developed uncalcified fibrocartilage histologically. In addition, the LHT was fused with the glenohumeral joint capsule and was attached to the glenoid labrum directly.
CONCLUSIONS
CONCLUSIONS
The LHT could affect the glenohumeral joint capsule or the glenoid labrum because of their connections to each other and be associated with the posterior shoulder instability indirectly.
Identifiants
pubmed: 30976729
doi: 10.1016/j.jses.2019.01.001
pii: S2468-6026(19)30003-8
pmc: PMC6443837
doi:
Types de publication
Journal Article
Langues
eng
Pagination
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