l62 



THE MUSCLES. 



Insertion (Fig. 82, b). 



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. 

 Re/at ions. — Lateral 

 surface with the scapula 

 and the capsule of the 

 shoulder-joint. Medial 

 surface with the levator 

 scapulae (Fig. 73, //), ser- 

 ratus anterior (Fig. 73, z), 

 part of the scalenus (Fig. 

 72)^ f)y the transversus cos- 

 tarum (Fig. 73, J), and the 

 coracobrachialis (Fig. yy, f). 

 Cranial border with the supraspina- 

 tus (Fig. yy, d). Caudal border 



Fig. 77. — Muscles on thk 

 OK THK Arm. 



Ml.DlAI. SlDK 



M. epitrochlearis, M. cLivobrachialis, and tlie 

 breast-muscles have been removed. a, M. 

 subscapularis; l>, insertion of M. levator scapulai 

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

 (/, M. supraspinatus; i\ M. latissimus dorsi (e' , 

 cut edge of that ])art which becomes united with 

 the bicipital arch); f, M. coracobrachialis; g^ M. 

 biceps brachii (the capsule of the joint has been 

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

 of ]iecioralis muscles; /, 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 Ijrachii; /, short j)or- 

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

 cut end of M. clavobrachialis; ii, M. Ijrachiora- 

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

 M. extensor carpi radi.nlis brevis; </, M. pro- 

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

 palmaris longus (j'', its tendons); t, M. ilexor carpi 

 uhmris(/', ulnar head; t' , humeral head); ii, thinl 

 head of M. Ilexor profundus digitorum; //, fifili 

 head of M. flexor ]irofundus digitorum; ti" , one 

 of the tentlons of M. flexor profundus digitorum; 

 V, M. pronator quadratus; 7i', M. alxluclor brevis 

 poUicis; .r, ulnar part of M. flexor subliinis digi- 

 torum. I, transverse ligament of the wrist. 



