208 



ELEMENTS OF MAMMALIAN ANATOMY. 



branches of the sixth, seventh, and eighth cervical nerves 

 and the first thoracic nerve form the brachial plexus. 

 This may be displayed by removing the cephalo-humeral 

 muscle and cutting through the pectoral muscles about two 



FIG. 105. VENTRAL ASPECT OF THE BRACHIAL PLEXUS AND CHIEF NERVES 



OF THE ARM. 



6, 7, 8 and i, Sixth, seventh, and eighth cervical and first dorsal nerves ; 

 at, ath, anterior thoracic nerves ; a and b, to muscles of the forearm ; 

 c and d, to the joint; ex, circumflex nerve; cu, internal cutaneous; 

 de, to the deltoid ; g, to the digits ; /, to the digits ; fo, supracondy- 

 loid foramen; It, long thoracic; me, musculocutaneous ; me, median 

 nerve; pi, posterior interosseous ; pth, posterior thoracic; sp, mus- 

 culospiral; sp, to suprascapular region; sb, to subscapular region; 

 sx, subscapular ; ra, radial ; un, ulnar nerve. 



