162 



THE MUSCLES. 



Insertion (Fig. 82, t>}. The fibres converge to the glenoid 



border, and the insertion is by 

 a strong, flat tendon into the 

 dorsal border of the lesser 

 tuberosity of the humerus. 

 Relations. Lateral 

 surface with the scapula 

 and the capsule of the 

 shoulder-joint. Medial 

 surface with the levator 

 scapulae (Fig. 73, fi), ser- 

 ratus anterior (Fig. 73, /), 

 part of the scalenus (Fig. 

 73 > /)> the transversus cos- 

 tarum (Fig. 73, j"), and the 

 coracobrachialis (Fig. 77, /"). 

 Cranial border with the supraspina- 

 tus (Fig. 77, d}. Caudal border 



FIG. 77. MUSCLES ON THE MEDIAL SIDE 

 OF THE ARM. 



M. epitrochlearis. M. clavobrachialis, and the 

 breast-muscles have been removed. a, M. 

 subscapularis ; 6, insertion of M. levator scapulae 

 and of M. serratus anterior; c, M. teres major; 

 d, M. supraspinatus; e, M. latissimus dorsi (<?', 

 cut edge of that part which becomes united with 

 the bicipital arch); _/j M. coracobrachialis; g t M. 

 biceps brachii (the capsule of the joint has been 

 laid open to show its tendon); A, cut insertions 

 of pectoralis muscles; i, caput longum of M. tri- 

 ceps brachii; j, long portion of caput mediale 

 of M. triceps brachii; /', intermediate portion of 

 caput mediale of M. triceps brachii ; /, short por- 

 tion of caput mediale of M. triceps brachii; m, 

 cut end of M. clavobrachialis; , M. brachiora- 

 dialis; o, M. extensor carpi radialis longus; p, 

 M. extensor carpi radialis brevis; q, M. pro- 

 nator teres; r. M. flexor carpi radialis; s, M. 

 palmaris longus (s', its tendons); /, M. flexor carpi 

 ulnaris (f, ulnar head; t' '. humeral head); 11, third 

 head of M. flexor profundus digitorum; TI', fifth 

 head of M. flexor profundus digitorum; M", one 

 of the tendons of M. flexor profundus digitorum; 

 v, M. pronator quadratus; w, M. abductor brevis 

 pollicis; x, ulnar part of M. flexor sublimis digi- 

 torum. I. transverse ligament of the wrist. 



