THE VEINS. 



319 



V. cephalica 



lying in the palm 



Fig. 130. 



SurKRMCIAL 



Arteries, 

 Veins, and 

 Nerves on 

 THE Extensor 

 Side of t h e 

 Arm and Dor- 

 sum OF the 

 Hand. 



a, V. cephalica; 

 /', V. mediana cu- 

 biti; c, V. cepha- 

 lica antibrachii; d, 

 A. collateralis radi- 

 aHs superior; e, 

 Aa. and Vv. digi- 

 tales dorsales; f, 

 A. radialis; g, su- 

 ])erficial r ad i a 1 

 nerve; //, N. nms- 

 culocutaneus; ?', N. 

 cutaneus niediahs. 



(Fig. 130). — Several superficial branches 

 of the hand unite to form a common trunk 

 which curves about the radial side of 

 the wrist and here unites with a simi- 

 larly formed trunk from the dorsum of 

 the hand. The vein formed by this 

 union, vena cephalica (antibrachii) (f), 

 passes to the elbow accompanying the 

 radial nerve {g) and the collateral radial 

 artery {d), and lying on the extensor 

 carpi radialis longus muscle just beneath 

 the integument. It receives small lateral 

 superficial branches. At the elbow it 

 divides into two : these are the vena 

 cephalica (humeri) {a) and the vena 

 mediana cubiti {b). The latter passes 

 beneath the pectoantibrachialis muscle, 

 across the biceps, and unites with the 

 brachial vein in the concavity of the 

 elbow. 



The vena cephalica (humeri) passes 

 at the elbow onto the upper arm, fol- 

 lowing the lateral border of the 

 clavobrachial muscle. It thus 

 reaches the acromiodeltoid muscle, 

 where it divides into two branches. 

 One passes inward beneath the 

 acromiodeltoid, and joins the 

 vena circumflexa posterior (a 

 branch of the axillary). The 

 second continues over the 

 outer surface of the shoulder, 

 and finally joins the vena 

 transversa scapulae (a branch 

 of the external jugular). 



D. V. jugularis externa 

 (Fig. 131; Fig. 65, 5, page 

 109). — The external jugular 



