THE LIMl'.S OF 111 K HORSE 



51 



as the artery buries itself between the radius and the flexor carpi 

 radialia muscle, and, later, between this muscle and the deep flexor of 

 the digits. In some instances the nerve becomes again superficial just 

 as it is about to terminate in the distal third of the forearm in the 

 depression bounded by the flexor carpi ulnaris and flexor carpi radialis. 

 The exact relation of the median nerve and artery at the level of 



M. extensor carpi radialis. 



X. cutaiieus autibraclui 



lateralis. 

 V. cephalica accessoria. 



Radius. 



X. cutaueus antibrachii 



lateralis. 

 V. cephalica antibrachii. 



A. mediana. 



V. mediana. 

 X. medianus. 



M. flexor carpi radialis. 



If. flexor carpi ulnaris 



M. extensor digitorum 



commuuis. 



= __ X. radialis. 



M. abductor pollicis. 

 A. interossea dorsalis 



M. extensor digiti 

 quinti. 



M. extensor carpi 

 ulnaris. 



M. flexor digitorum 

 profundus (caput 

 humerale). 



M. flexor digitorum profundus 

 (caput ulnare). 



\ X V. collateralis,ulnaris. 

 M. flexor digitorum sublimis. X. ulnaris. 



Fig. 33. — Section across the Forearm at the Level indicated by C in Fig. 30. 



the elbow joint and in the most proximal part of the forearm is subject 

 to variation — a circumstance that must be kept in mind in connection 

 with operations in this region. Commonly, the nerve passes obliquely 

 over the medial face of the artery, as the elbow joint is being crossed. 

 It may, however, run for a distance upon (that is, superficial to) the 

 artery. Or it may follow the anterior (dorsal) border of the artery 

 throughout. 



The median nerve ends by dividing into the medial and lateral 

 volar nerves. The collateral branches are all given off a short distance 

 beyond the elbow joint and supply the flexor carpi radialis and the 



