SCAPULAR MUSCLES. 



211 



the latissimus dorsi at its lower angle, and in the intermediate portion it remains 

 superficial. 



The teres minor muscle is placed along the outer border of the infraspinatus, 

 and is intimately connected with that muscle. It arises by a series of fibres 

 from a narrow obliquely grooved surface on the dorsum of the scapula close 

 to the axillary border, aud from aponeurotic septa between it and the infra- 

 spiuatus and teres major muscles, and is inserted by tendon into the greater 

 tuberosity of the humerus, immediately below the infraspinatus, and by fleshy 

 fibres into the bone for a short distance lower down. 



Fig. 177. 



Fig. 177. MUSCLES OF THE RIGHT 

 SHOULDER AND ARM, SEEN FROM 



BEHIND. 



The acromion process and a part 

 of the spine of the scapula, with 

 the deltoid muscle, have been re- 

 moved, a, coracoid process ; 6, 

 triangular surface at the commence- 

 ment of the spine ; c, is close to 

 the cut portion of the spine ; d, 

 greater tuberosity ; e, olecranon of 

 the ulna ; /, is close to the external 

 condyloid eminence and head of the 

 radius ; 1, supraspinatus muscle ; 

 2, infraspinatus ; 3, teres minor, 

 placed over the triangular interval ; 

 4, teres major ; 5, part of latissi- 

 mus dorsi ; + , slip from the in- 

 ferior angle of the scapula ; t, on 

 the edge of the humerus, points to 

 the tendon of the latissimus dorsi 

 and the quadrangular interval ; 6, 

 scapular head of the triceps, passing 

 above between the teres major and 

 miiior ; 6', outer head ; 6", lower 

 part of the same, below the spiral 

 groove, continued from the inner 

 head ; 6'", part of the inner head ; 

 7, anconeus. 



The teres major muscle 

 arises from the flat oval sur- 

 face on the dorsum of the 

 scapula near its inferior angle, 

 slightly from the axillary bor- 

 der of the bone, and from the 

 septa interposed between it 

 and the teres minor and infra- 

 spinatus. It is inserted by a 

 flat tendon about two inches 

 wide, into the inner or posterior 

 border of the bicipital groove 

 of the humerus, behind and in 

 contact with the tendon of the 



latissimus dorsi, to which it is adherent for a short space. Close to the 

 insertion, however, the tendons of these muscles are separated by a small 

 bursa. The fibres of the muscle are longitudinal. 



p2 



