216 



MYOLOGY. 



Insertion, — By a flat tendon, which joins that of the latissi- 

 mus dorsi, to the internal tuberosity of 

 the humerus, between the tendons of in- 

 sertion of the coraco-humeralis. 



Relation. — Postero - externally with 

 the fascia of the latissimus dorsi and 

 scapulo-ulnaris ; anteriorly with the sub- 

 scapularis; internally with the serratus 

 magniis; inferiorly with the coraco- 

 ■ humeralis and humeralis obliquus. 



Action. — To adduct, and rotate the 

 humerus inwards ; acting with the teres 

 externus the result is flexion. 



SCAPULO-HUMERALIS POSTICUS. 

 (Scapulo-kumeralis Gracilis — Grele. ) 



Situated behind the shoulder joint, 

 between the caput magnum and the cap- 

 sular ligament, it is very small, slender-, 

 and fusiform, with a pale, delicate, fleshy 

 belly, and tendinous extremities. 



Origin. — From the postero-inferior 

 part of the scapula, just above the 

 glenoid cavity, and the capsular ligament 

 of the shoulder joint. 



Insertion. — Between the fibres of the 

 humeralis obliquus, to the posterior part 

 of the humerus, just below its head. 



Action. — To render tense the capsular 

 ligament of the joint, and thus prevent 

 its being crushed during flexion ; this 

 action was ascribed to it by Bigot, who 

 was the first to describe it. It is 

 believed to be peculiar to the solidun- 

 gula. 



Fio. 79. 



Mascles of the anterior limb- 

 internal view, a, Subscapolaris; 

 b, Teres intemus ; c, Coraco- 

 humeralis; d, Scapulo-ulnaris; 

 e. Flexor metacarpi intemus; 

 /, Plexor metacarpi medius; g, 

 «Capat parvum. 



Brachial Region. 



I This region clothed by the brachial fascia, includes the muscles 

 Tvhich cover the humerus and its vicinity j they consist of an 



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