702 



THE XER VOL'S SYSTEM 



(h) The nerves to the flexor carpi radialis, palmaris longus, and flexor 

 sublimis digitorum ari^e a little linver down, and pierce the pronator-tlexor mass 

 of niuselef^, tn end in the respective members of the group for whieh thev are 

 destined. 



(c) The anterior interosseous nerve arises from the median at the level of the 

 bicipital tubercle of the ra-dius and run downwards on the interosseous membrane 



Fig. 457a. — Dissection' of the Left Arm from the Front, Showixg Portioxs of the 

 Ulnar, Median, Musculo-cutaxeous, and Musculo-spiral Nerves. 



Subscapularis 



Teres major 



Long head of triceps 

 Latissimus dorsi 



MUscuLO-CL'TA XEO f '> \nn I 



MEDIA X XER V 



UJ.XAR XERVE 



Internal head of triceps 



Pronator radii teres 

 Flexor carpi radialis 



Pronator radii teres 

 deep head) 



Flexor sublimis digitorum 



Coraoo-braohialis 

 Biceps 



Peotoralis major 



Brachialis antlcus 



Biceps 



.1/ ( -^'iCUL 0-SPIRA L 

 XER VE 



RADIAL XERVE 

 POSTERIOR IXTER- 



OSSEOUS XERVE 



Extensor carpi radialis 



longior 



AXTERIOR IXTER- 

 OSSEOLS XERVE 



accompanied by the anterior interosseous artery. It passes under cover of the 

 pronator quadratus, and pierces the deep surface of that muscle. The anterior 

 interosseous nerve also furnishes a twig to tlie front of the Avrist-joint and supplies 

 the flexor profundus digitorum" and the flexor longus pollicis. The nerve to the 

 former muscle arises from the anterior interosseous near its commencement and 

 supplies the outer two divisions of the muscle, and communicates wdthin its sub- 

 stance with twigs derived from the ulnar nerve. 



