BRANCHES OF THE RADIAL ARTERY. 



541 



Anastomotica 

 magna. 



Radial 

 recurrent. 



interosseous. 



Anterior ulnar 

 recurrent. 



Posterior ulnar 

 recurrent. 



Muscular. 



in front it divides into two dorsal digital branches, which supply the adjoining 

 sides of the index and middle fingers, inosculating with the digital branch of the 

 superficial palmar arch. 



The dorsales pollicis are two vessels which run along the sides of the dorsal 

 aspect of the thumb. They arise 

 separately, or occasionally by a com- 

 mon trunk, near the base of the first 

 metacarpal bone. 



The dorsalis indicis, also a small 

 branch, runs along the radial side of 

 the back of the index finger, send- 

 ing a few branches to the Abductor 

 indicis. 



The princeps pollicis arises from 

 the radial just as it turns inward to 

 the deep part of the hand ; it de- 

 scends between the Abductor indicis 

 and Adductor obliquus pollicis, then 

 between the Adductor transversus 

 pollicis and Adductor obliquus pol- Posterior 

 licis, along the ulnar side of the 

 metacarpal bone of the thumb, to 

 the base of the first phalanx, where 

 it divides into two branches, which 

 run along the sides of the palmar 

 aspect of the thumb, and form an 

 arch on the palmar surface of the 

 last phalanx, from which branches 

 are distributed to the integument 

 and pulp of the thumb. 



The radialis indicis arises close 

 to the preceding, descends between 

 the Abductor indicis and Adductor 

 transversus pollicis, and runs along 

 the radial side of the index finger 

 to its extremity, where it anastomoses 

 with the collateral digital artery 

 from the superficial palmar arch. 

 At the lower border of the Adductor 

 transversus pollicis this vessel anas- 

 tomoses with the princeps pollicis, 

 and gives a communicatine: branch 



O tj _ 



to the superficial palmar arch. 



The perforating arteries, three in 

 number, pass backward from the 

 deep palmar arch between the heads 

 of the last three Dorsal interossei 

 muscles, to inosculate with the dorsal 

 interosseous arteries. 



The palmar interosseous, three or 

 four in number, arise from the con- 

 vexity of the deep palmar arch ; they run forward upon the Interossei muscles, 

 and anastomose at the clefts of the fingers with the digital branches 

 superficial arch. 



The palmar recurrent branches arise from the concavity of the < 

 arch. They pass upward in front of the wrist, supplying the carpal articulatu 

 and anastomosing with the anterior carpal arch. 



Anterior carpal. 

 Superficial^ volse. 



Muscular. 



Anterior carpal. 



Deep branch of 

 ulnar. 



FIG. 305. Ulnar and radial arteries. Deep view. 



