718 



THE NERVOUS SYSTEM OF THE OX 



and first thoracic nerves; the second thoracic nerve furnishes no root, but the ven- 

 tral branch of the sixth cervical goes almost entirely to the plexus after giving off 

 the nerve to the rhomboitleus and the cervical part of the serratus magnus. 



The differences in the nerves above the elbow are not of sufficient moment 

 to receive notice in this brief account, but below this point there are naturallj' 

 important s]i(>cial features correlated chiefly with the arrangement of the 

 digits. 



The radial nerve is continued below the elbow by a large cutaneous branch 

 (N. cutaneus antibrachii dorsalis) which emerges at the lower border of the exter- 



Dorsal 



branch of 



ulnar nerve 



Radial nerve 

 (cutaneous 

 branch) 



Median nerve- 



'Ulnar nerve 



A nastomotic 

 branch 



Fig. 5.30. — Nerves op Distal, Part op Right Fore 



Li.MB op Ox, Anterior View (Schematic). 



p, Doreal (iiKital nerves. 



Fig. 5.31. — Nerves of Distal Part of Right Fork 



LiMi) of Ox, Posterior View (Schematic). 



p, Volar digital nerves. 



nal head of the triceps and descends on the dorsal aspect of the limb. It commu- 

 nicates above the carpus with the cutaneous branch of the median nerve and 

 terminates in three dorsal digital nerves; two of these descend along the axial 

 or interdigital side of tiie dorsal surface of the chief digits, and the third along 

 the inner (abaxial) side of the inner chief digit. 



The ulnar nerve divides at a varialile distance down the forearm into two 

 branches. The dorsal or superficial branch (^merges between the tendons of the 

 external and middle fl(^xors of the carpus, and is continued as the external dorsal 

 digital nerve on the outer chief digit. The volar or deep branch descends along the 

 superficial digital flexor, gives a branch to the suspensory ligament below the carpus, 



