I302 



HUMAN ANATOMY, 



pronators and all the flexors except the flexor carpi ulnaria and the ulnar half of the 

 flexor profundus digitorum are supplied by it. The second phalanges of the middle 

 and index fingers cannot be flexed, although the first phalanges can be flexed and 

 the second and third extended in all the fingers through the interossei muscles ; 

 flexion of the third phalanges of the little and ring fingers can be accomplished by 

 the ulnar half of the flexor profundus, which is supplied by the ulnar nerve. The 



Fig. 1097. 



Brachio-radialis tendon 

 Branch of radial ner\'e 



Palmar cutaneous br. of 

 median nerve 



Median nerve 

 Flexor carpi radialis tendon 



Abductor pollicis 

 Opponens poUicis 



Abductor poUicis 



Digital brs. of 



median nerve 



Adductor 



transversus poUicis 



Flexor sublimis digitorum 



Flexor carpi vilnaris 

 Palmar cutaneous br. of ulnar 

 nerve, lying upon ulnar 

 arterj' 

 Ulnar nerve 



Pisiform bone 



Deep branch of ulnar nerve 

 Abductor minimi dig^ti 



Palniaris brevis, reflected 

 Digital brs. of ulnar nerv'c 



pponens minimi digiti 

 Flex, brevis minimi digiti 



Superficial dissection of right palm, showing branches of median and ulnar nerves ; part of anterior 

 annular ligament has been removed to expose median nerve. 



thumb cannot be flexed or abducted, although it may be adducted. One of the 

 most characteristic features of the hand is lost — that is, the ability to appose the 

 thumb to any one of the fingers, as in picking up small objects. 



In wounds of the axilla the median is the nerve most frequently injured, the 

 musculo-spiral least frequently, as the median lies more superficially and the musculo- 

 spiral behind the vessels. In the arm the median can be easily found to the inner 

 side of the biceps and coraco-brachialis muscles, where it lies on the brachial vessels. 

 At the elbow it is found to the inner side of the brachial artery, the guide to 

 which is the biceps tendon which in turn lies just to the outer side of the artery. 

 A.t about the middle of the wrist the nerve lies under the palmaris longus tendon. 



