SHOULDER, -I KM, /YM'A'./AM/, AND HAND, 



181 



tin- origin of the flrxor longus pollicis muscle ; (4) the origin of the flexor pn>- 

 fuiulus digitorum ; (5) the .interior iiHerosseous .irtery and nerve on the inter- 



ous iiieinhiane, hut lying deeply between two muscles the flexor prof undue 

 digitorum and tile flexor longus pollicis. 



The Median Nerve and its Branches. Take the nerve up, and you can 

 easily tnuv muscular branches with the foreeps to all the muscles on the front 



Peotoralia minor 



Coraco-brachialu 



Long bead or trieeps 



Inner bead of trioeps 



Braohialia antious 



Serntlunar fasoia 



Tendon* of insertion of pec- 

 toralia major and aeltoid 



Outer bead cl trioepa 



Brachialig anticua 



Eztenaor carpi radlalia 

 longior 



Braobio-radtalla 



Kli;. I2(). SlTKRKICIAI. VlKW OK THK KkoNI of TIIK Ul'l'KK ARM. 



part of the forearm except the flexor carpi ulnaris and half of the flexor profundus 

 digitorum muscles ; the flexor carpi ulnaris and the ulnar half of the flexor 

 profundus digitorum muscles are supplied by the ulnar nerve. You will observe 

 that some of the branches of this nerve are given off above the articulation, 

 i ML;-. 123.) Remember, the shape of a muscle is an index to nerve distribution. 

 See introductory chapter. 



