THE LIMBS OF THE HOKSE 



51 



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

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

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

 a^ 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. 



N. cutaneus antibrachii 



lateralis. 

 V. cephalica accessoria. 



Radius. __ 



N. cutaneus antibrachii 



lateralis. 

 V. cephalica antibrachii. 



A. mediana. . =: 



V. mediana. 

 N. medianus. 



M. flexor carpi radialis. 



M. flexor carpi ulnaris 



M. extensor digitorum 

 communis. 



N. radialis. 



M. abductor poUicis. ^.^ . 

 A. interossea dorsalis. 

 M. extensor digit! (- 0_C:. 

 ,quiiiti. 



M. extensor carpi 

 ulnaris. 



M. flexor digitorum 

 profundus (caput 

 hum era! e). 



M. flexor digitorum profundus 

 (caput ujnare). 



\ '""V. collateralis,ulnaris. 



M. flexor digitorum sublimis. N. 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^nd .sunpJj ^^®/^|f ^^^' ^^^^^ radialis and the 



