734 



ARTERIES OF THE HAND. 



where they each divide and run alorig the adjacent sides of 

 opposing fingers to their extremities, excepting the radial 

 side of the index finger which is supplied from the radial. 



The circus profundus 

 is one of the termina- 

 ting branches of the 

 radial ; it extends from 

 the root of the me- 

 tacarpal bone of the 

 thumb, deep into the 

 palm of the hand, be- 

 hind the flexor ten- 

 dons, and close to the 

 metacarpal bones, 

 forming an arch across 

 the hand from the ra- 

 dial to the ulnar side, 

 to anastomose with 

 the superficial arc. In 

 its course it gives off 

 branches to the inter- 

 osseous muscles, and 

 perforating branches 

 through the interos- 

 seous spaces to the dorsal interossei. The arteries of the 

 hand are subject to great variety. 



FIG. 236, A represents the arcus superficialis. a Ulnar artery. 6 Its rela- 

 tion with the annular ligament, c Ulnar artery in the palm of the hand. 

 d e fg h i Its digital branches, j Place of anastomosis with the arcus profundus. 

 k Point where the radial artery terminates. I I Digito radial arteries- 

 m m Digito ulnar arteries, nn Place where the radial and ulnar digital 

 branches anastomose, o Radial artery, p Its place of turning on the back of 

 the hand, q Its last branch, called radialis indicis. r Termination of arcus 

 profundus. s t Muscular branches of the radial at the wrist, u v Superficialis 

 volae. 



FIG. 236, B represents the arcus profundus. c Point where the radial artery 

 enters the palm of the hand. & Anastomosing branch, c Branch on the side 

 of the thumb. (/Branch to Ihe fore finger, e Anastomosis of arcus profundus 

 with an ulnar digital branch. / Arteria magna pollicis. g h ij k I Interosseous 

 branches. 



