840 



THE NERVOUS SYSTEM OF THE OX 



rumen and the adjacent surface of the abomasum. The ventral oesophageal 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. 



Dorsal- 

 branch of 

 ulnar nerve 



Radial nerve 

 {cutaneous 

 branch) 



Median nerve - 



'Ulnar nerve 



Anastomotic 

 branch 



Fig. 667. — Nerves of Distal Part of Right Fore- 

 limb OF Ox; Dorsal \'iew (Schematic). 

 p, Dorsal digital nerves. 



Fig. 668. — Nerves of Distal Part of Right Fore- 

 limb OF Ox; Volar View (Schematic). 

 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 



