292 



ELEMENTAR Y ANA TO MY. 



[LESS. 



The deltoid is triangular in outline, and covers over the 

 shoulder-joint. Springing from the clavicle and the spine of 

 the scapula, it is inserted into the rough prominence on the 

 outer side of the shaft of the humerus. 



Supra-spinatus. This name is given to the muscle which 

 occupies the supra-spinous fossa of the scapula. It is in- 

 serted into the greater tuberosity of the humerus. 







FIG. 268. ANTERIOR MUSCLES OF THE TRUNK the pectoralis major of the right 

 side and the left external oblique being removed. 



i, pectoralis major; 2, pectoralis minor; 3, subclavius ; 4, serratus magnus ; 5, 

 internal intercostals ; 6, external oblique ; 7, internal oblique ; 8, linea alba. 



The infra-spinatus, also named from its origin, is also 

 inserted into the same tuberosity. 



The teres minor is a small muscle inserted like the two 

 preceding, and arising from the axillary border of the scapula. 

 The teres major goes from the inferior angle of the scapula 

 to the lesser tuberosity, which also gives insertion to the large 

 subscapularis muscle arising from the fossa of the scapula on 

 its inner surface. 

 : The coraco-brachialis, small and inconspicuous, springs 



