162 THE MUSCLES. 
Insertion (Fig. 82, 6\.—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 
scapule (Fig. 73, 2), ser- 
ratus anterior (Fig. 73, 2), 
part of the scalenus (Fig. 
73, f), the transversus cos- 
tarum (Fig. 73, 7), and the 
coracobrachialis (Fig. 77, /). 
Cranial border with the supraspina- 
tus (Fig. 77, @). Caudal border 
Fic. 77.—-MuscLes ON THE MEDIAL SIDE 
OF THE ARM. 
M. epitrochlearis, M. clavobrachialis, and the 
breast-muscles have been removed. u, M. 
subscapularis; 4, insertion of M. levator scapulz 
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); 4, M. coracobrachialis; g, M. 
biceps brachii (the capsule of the joint has been 
laid open to show its tendon); 4, cut insertions 
of pectoralis muscles; z, caput longum of M. tri- 
ceps brachii; 7, long portion of caput mediale 
of M. triceps brachii; 4, intermediate portion of 
caput mediale of M. triceps brachii; 4, short por- 
tion of caput mediale of M. triceps brachii; 7, 
cut end of M. clavobrachialis; ~, M. brachiora- 
dialis; 0, M. extensor carpi radialis longus: J, 
M. extensor carpi radialis brevis; 7, M. pro- 
nator teres; 7, M. flexor carpi radialis; », M. 
palmaris longus (s’, its tendons); ¢, M. flexor carpi 
ulnaris (¢, ulnar head; 2’, humeral head); 2, third 
head of M. flexor profundus digitorum; ’, fifth 
head of M. flexor profundus digitorum; z’’, one 
of the tendons of M. flexor profundus digitorum; 
v, M. pronator quadratus; w, M. abductor brevis 
pollicis; «, ulnar part of M. flexor sublimis digi- 
torum, I, transverse ligament of the wrist. 
