THE NERVOUS SYSTEM OF THE OX 



■19 



and unites with the external Ijranch of the niechan nerve to form the external 

 volar digital nerve. 



The median nerve is much larger than the ulnar. It passes beneath the prona- 

 tor teres, descends the forearm as in the horse, and divides in the distal part of the 

 metacarpus into two branches. The internal branch gives twigs to the inner small 

 digit and is continued on the inner side of the volar surface of the inner chi(>f digit 

 as the internal volar digital nerve (N. digitalis medialis digiti III); it also concurs 

 with the outer branch in forming the two digital n(n-v(>s which descend along the 

 interdigital aspect of the chief digits. The external branch is larger. It bifurcates, 



Superficial 

 peroneal nerve ~ 

 Deep peroneal^ 

 nerve ,- 

 Internal sa-/ 

 phenous nerve 



Tibial nerve ■ 



Internal plantar 

 nerve 



External saphen- 

 ous nerve 



External phu I tar 



nerve 



~ — Deep branch 



Fig. 532. — Nerves of Distal Part of Right Hind 



Limb of Ox, Anterior View (Schematic). 



-p, Dorsal digital nerves. 



Fig. 53.3. — Nerves of Distal Part OP Right Hind 



Limb of Ox, Posterior View (Schematic). 



p, Plantar digital nerves. 



and one division unites with the twig from the internal brancH to form a common 

 digital trunk. From the latter two digital nerves proceed as mentioned above; 

 these are the external and internal volar digital nerves of the internal and external 

 chief digits respectively (N. digitalis volaris lateralis digiti III, medialis digiti IV). 

 The other division unites with the volar branch of the ulnar nerve to form tht 

 external volar digital nerve of the external chief digit (N. digitalis lateralis digiti 

 IV). 



The lumbo-sacral plexus and its branches to the pelvis and thigh present no 

 very striking special features. 



The superficial peroneal nerve is much larger than in the horse. After crossing 



