io8 



THE UPPER EXTREMITY 



FIG. 43. 

 Forearm 

 mapped out. 



fundus is the large 



lateral side. Finally it leaves 

 the forearm by passing be- 

 hind the transverse carpal 

 ligament. A small artery, 

 the a. mediana, a branch of 

 the volar interosseous artery, 

 accompanies the median 

 nerve. Sometimes this vessel 

 attains a considerable size. 

 As the median nerve 

 enters the forearm it gives 

 off numerous branches for 

 the supply of muscles, and 

 near the wrist it supplies 

 a ramus palmaris, which has 

 already been dissected (p. 



95> 



The muscular branches 



supply all the muscles of the 

 superficial group, therefore, 

 with the single exception of 

 the flexor carpi ulnaris ; viz. 

 the pronator teres, the flexor 

 carpi radialis, the palmaris 

 longus, and the flexor digi- 

 torum sublimis. 



It likewise supplies a 

 long slender twig volar in- 

 terosseous nerve which goes 

 to the deep muscles on the 

 anterior aspect of the fore- 

 arm. 



Deep Structures on the 

 front of the Forearm. 

 The connections of the 

 deep muscles must now be 

 studied, and at the same 

 time the volar interosseous 

 artery and volar interosse- 

 ous nerve must be followed. 

 The flexor digitorum pro- 

 muscle which clothes the volar and 



