536 



THE AUTKRIES 



III. IvELATK)NS f)F THE UlNAR ArtERY IX THE PaLM 



(Superficial Palmar Arch) 



Tlie ulnar artery, on entering the palm, divides into t\vol)ranches, the superficial 

 and deep. 



The superficial branch (fig. 354), the direct continuation of the vessel, anast<v 

 moses with the superficial volar, a hranch of the radial, forming what is then known 



Fig. 354.— Anastomoses and Distributiux of the Arteries of the Hand. (WaLsham.) 



7 



Anterior interosseous 



Radial artery 



Anterior radial carpal 



Superfciat rolar 

 Posterior radial carjial 

 Radial artery at urisl 



Dorsalis pollicis 



Metacarpal or 



first dorsal 



interosseous 



Princeps pollicis 



Dorsalis indicis 

 Radialis indicis 



First dorsal branrh of collalpral 

 digital 



Second dorsal branch of collateral 

 digital 



Anastomosti of collateral digital 

 arteries about matrix of nail 

 and pulp of finger 



Ulnar artery 



Anterior ulnar 

 carpal 



Posterior ulnar 

 carpal 



Deep ulnar 

 Superficial arch 



Carpal recurrent 



Posterior communi- 

 cating or perforat- 

 ing 



Palmar interosseous 



Second, third, and 

 fourth jialniar 

 digital 



Second and third 

 dorsal interosseous 



First jialmar digital 



Anterior commuiii- 

 cating or perforat- 

 ing 



as the superficial palmar arch. After descending a short distance towards the 

 cleft between the fourth and lifth fingers, it turns outwards towards the thumh, 

 forming a curve witii its convexity towards the fingers and its concavity towards 

 the muscles of the thuml), and anastomoses o])])()site the cleft hetween the index 

 and middle fingers, at tlie junction of the upjier with the middle third of the palm, 

 with the sup(Tficial volar hranch of the radial artery to complete th(> arch. A line 

 drawn across the ])alm on a level with the thumb at a right angle to the hand will 

 roughly indicate the situation of the arch. 



