840 THE NERVOUS SYSTEM OF THE OX 
rumen and the adjacent surface of the abomasum. The ventral cesophageal trunk 
goes to the left surface of the rumen; it supplies branches to the hepatic plexus 
and to all the divisions of the stomach. 
The spinal accessory nerve presents two special features. The part which 
joins the jugular ganglion bears a small ganglion. The ventral branch supplies 
both parts of the sterno-cephalicus. 
The hypoglossal nerve is large. It is connected with the ventral division of 
the first cervical nerve by a branch of considerable size, and detaches a long branch 
which runs backward along the carotid artery. 
\ \ Radial nerve Median nerve 
(cutaneous 
branch) 
Ulnar nerve 
Dorsal 
branch of 
ulnar nerve 
te 
_ Anastomotic 
branch 
Fic. 667.—Nerves or Distat Parr oF Ricur FoRE- Fic. 668.—Nerves or Distat Parr or Ricut Fore- 
LIMB OF Ox; DorsaL VIEW (SCHEMATIC). LIMB OF Ox; VOLAR VIEW (SCHEMATIC), 
p, Dorsal digital nerves. p, Volar digital nerves. 
The spinal nerves resemble those of the horse in origin and general arrange- 
ment. The thoracic nerves number thirteen pairs. The more important differ- 
ences in the limb-plexuses and their branches are as follows: 
The brachial plexus is formed by the ventral branches of the last three cervical 
and first thoracic nerves; the second thoracic nerve usually furnishes no root, but 
the ventral branch of the sixth cervical goes almost entirely to the plexus after 
giving off the nerve to the rhomboideus and the serratus cervicis. 
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 naturally 
