THE TERES MINOR MUSCLE. oqi 



pclatlms. — The supraspinatus muscle is covered by the trapezius and the acro- 

 mion process. The suprascapular nerve and artery pass beneath it. 



The infraspinatus muscle is bound down by the aponeurosis which superiorly 

 and externally divides so as to enclose the deltoid muscle. It is covered by the 

 deltoid at its upper and outer part, and by the trapezius at its upper and inner 

 part, by the latissimus dorsi at its lower angle, and in the intennediate portion it 

 remains superficial. 



Vartcticx. — The infraspinatus muscle is sometimes very closely united with the 

 teres minor. The supraspinatus is very constant in its fonn and attachments. 



The teres minor muscle is placed along the outer border of the in- 

 fraspinatus, and is intimately connected with that muscle. It arises bv 

 a series of fibres from a 



narrow obliquely grooved Fig. iro. 



surface on the dorsum of 

 the scapula close to the 

 axillary border, and from 

 aponeurotic septa between 

 it and the infraspinatus 

 and teres major muscles, 

 and is inserted by tendon 

 into the greater tuberosity 

 of the humerus, immedi- 

 ately below the infraspina- 



Fig. 170. — Muscles op the 

 Right Shoulder and Arm, 

 seen prom behind. (a. t. ) \ 



The acromion process and a pai-t 

 of the spine of the scapula, with 

 the deltoid muscle, have been re- 

 moved, a, coracoid process ; S, 

 triangular surface at the com- 

 mencement 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 condylar eminence 

 and head of the radius ; 1, supra- 

 spinatus muscle ; 2, infraspinatus; 

 3, teres minor ; below the figure 

 is the triangular space ; 4, teres 

 major ; 5, part of latissimus dorsi ; 

 + , slip from the inferior angle of 

 the scapula ; f, on the edge of 

 the humerus, points to the ten- 

 tlon of the latissimus dorsi and 

 the quadrangular space ; 6, scapu- 

 lar head of the triceps, passing 

 above between the teres major and 

 minor ; 6', outer head ; 6", part of 

 the muscle rising below the spiral 

 groove, continuous with the inner 

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

 7, anconeus. 



tus, and by fleshy fibres into the bone for a short distance lower 

 down. 



IMations.—Th.m muscle is crossed behind by the deltoid, and hi front is in 

 relation with the long head of the triceps, and the capsule of the shoulder- joint. 



