452 



Veins of the Arm. 



V. cephalica 



V. mediana 

 cubiti 



N. cutaneus ,- / I \ / I 

 antibrachii "^c, / - ^-^ I / / 

 lateralis | i i A" / 



V. cephalic 

 accessoria 



N, cutaneus 



antibraohii 



medialis 



V. basilica 



V. basilica 



491. Superficial veins 

 of the right forearm, 



viewed from in front. 

 (Palm after W. Bramie.) 



The superflciaj yeiiis of the palm 



are much finer than those of the back 

 of the hand. They begin upon the pha- 

 hinges in a plexus in which one can 

 make out more or less distinctly the 

 vv. digitales volares propi-iae and out 

 of which most of the blood is conducted 

 to the posterior surface through several 

 vessels at the lateral margins of the 

 fingers. Similarly the vv. mte?-capitu- 

 lares (see also Fig. 490) conduct blood 

 into the spaces between the fingers from 

 the volar to the dorsal vessels. The 

 superficial network of the palm hes upon 

 the aponeurosis palmaris and upon the 

 fascia of the tlienar and hypothenar 

 eminences; in the latter two places the 

 network is somewhat closer. Proximal- 

 ward it goes over into the plexus in the 

 forearm. 



The superlicial veins of the forearm are 



also arranged in the form of a plexus. Among 

 them two are usually very distinct: 



V. cephalica 



metacarpea dor- 

 the ulnar side of 



Vv. inter- 

 capitulares 



Vv. digitales 



volares 



propriae 



1. V. basilica (see also Fig. 490) begins upon 



the back of the hand, frequently as the 

 continuation of the v 

 salis IV, loops around 

 the forearm to its volar surface and rims 

 on this as far as the elbow, then in the 

 sulcus bicipitalis medialis along the upper 

 arm as far as its middle third. There 

 it perforates the fascia, goes still- some 

 distance upward and unites sooner or 

 later with one of the (more delicate) 

 vv. brachiales. 



2. V. cephalica (see also Fig. 490) arises on 



the back of the hand, often especially 

 from the v. metacarpea doi'salis I, winds 

 around the radial side of the forearm to 

 its volar surface and extends on this as 

 far as the elbow; thence it goes u]>ward 

 in the sulcus bicipitalis lateralis and (in 

 a duplicature of the fascia brachii) in the 

 groove between the mm. pectoralis major 

 and deltoideus, sinks into the depth just 

 below the clavicle and after union with 

 a V. thoracoacromialis empties into the 

 V. axillaris (see also Fig. 492). Some- 

 times a second longitudinal vessel is sit- 

 . uated lateral ward on the forearm , the 

 V. cephalica accessoria, which opens into 

 the main vein. 



