540 



THE AUTKRTES 



third the tendon of the flexor carpi radialis, and throughout the -whole of its course 

 the internal vena comes. 



Variations in the Radial Artery in the Forearm 



(A) The radial artery may be given off from the brachial higher than usual, or from the 

 axillary artery. (B) It may arise from the brachial lower than the bend of the elbow, but a low 

 division of the brachial is rare. (C) It may run superficial to the fascia of the forearm. (I)) It 

 may cross over, instead of under, the extensors of the thumb. (E) It may terminate in the 

 forearm or be absent, its place in tlie forearm and hand being then supplied by the ulnar, 

 the anterior interosseous, or an enlarged median artery. (F) It may be joined by a vas aberrans 

 liom the brachial or axillary artery. 



Fig. 357. — The Bend of the Ei-bow, Left Side. 

 (From a dissection l>y Dr. Alder Smith in the Museum of St. Bartholomew's Hospital.) 



MEDIAN NERVE 



Posti-.rior branch 0/ 



anastomotica magna 



BRANCHES OF ( 



INTERNAL CUTA-J 



NEOUS NERVE ( 



Posterior ulnar vein 



BrachialiB antieus 



Anteriiir hrtinch of 

 anastomotica magna 

 Anterior ulnar vein 



Median basilic vein 



MUSCULAR BRANCH 

 OF MEDIAN NERVE 



Tendon of biceps 

 Bicipital fascia 



BrachialiB antieus 



Deep median vein 



Ulnar artery 



Pronator teres 



Radial arterii 



Biceps 



Internal vena 

 comes of 

 brachial artery 

 Basilic vein 



Brachialis 

 antieus 



Cephalic vein 



Brachial artery 

 EXTERNAL 

 CUTANEOUS 



NER VE 

 Miisciilo-spiral 

 n. and ascending 

 branch of radial 

 recurrent artery 

 Radial vein 

 Median cephalic 



vein 

 Ascending br. of 

 radial recurrent 

 RADIAL 



NERVE 



Radial recurrent 



artery 

 Supinator 



longus 

 Drxcnuling hr. 



of nidial 



recurrent 

 Median vein 



RADIAL 

 NERVE 



The branches of the radial artery in the forearm are : — (1) The radial re- 

 current; ('2) the muscular; (o) the anterior radial car])al; (4) the BU})erficial 

 volar. 



(1) The radial recurrent usually arises from the outer side of the radial just 

 helow its origin from the brachial. It at first runs outwards on the su])inator 

 brevis, and then divides into three chief branches (fig. 357). One of these runs 

 transversely outwards through the fibres of the musculo-spiral nerve, or between 

 the radial and posterior interosseous nerves when the musculo-si)iral divides higher 



