234 



ELEMENTS OF MAMMALIAN ANATOMY 



is then spoken of as the ventral branch. These main nerves or 

 ventral branches, in various regions of the trunk, anastomose 



Fig. 114. — 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, alh, 

 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, supracondyloid foramen; //, long thoracic; mc, musculo- 

 cutaneous; me, median nerve; pi, posterior interosseous; pth, posterior thoracic; 

 sp, musculospiral; sp, to suprascapular region; sb, to subscapular region; sx, 

 subscapular; ra, radial; un, ulnar nerve. 



with each other, forming plexuses. In the region of the neck, 

 where is formed the cervical plexus; in the region of the shoulder 

 the brachial plexus; in the region of the loins, the lumbar plexus; 



