CEPHALIC VEIN AXILLARY VEIN. 



337 



Fig. 120* 



The Cephalic vein (xsyaXy, the head) ascends along the outer side 

 of the arm to its upper third ; it then enters the groove between the 

 pectoralis major and deltoid muscles, where 

 it is in relation with the descending branch 

 of the thoracico-acromialis artery, and ter- 

 minates beneath the clavicle in the subcla- 

 vian vein. A large communicating branch 

 sometimes crosses the clavicle between the 

 external jugular and this vein, which gives 

 it the appearance of being derived directly 

 from the head hence its appellation. 



The Median vein is intermediate between 

 the anterior ulnar and radial vein ; it collects 

 the blood from the anterior aspect of the 

 fore-arm, communicating with the two pre- 

 ceding. At the bend of the elbow it receives 

 a branch from the deep veins, and divides 

 into two branches, the median cephalic and 

 median basilic. 



The Median cephalic vein, generally the 

 smaller of the two, passes obliquely outwards, 

 in the groove between the biceps and the 

 supinator longus, to join the cephalic vein. 

 The branches of the external cutaneous 

 nerve pass behind it. 



The Median basilic, vein passes obliquely inwards, in the groove 

 between the biceps and pronator radii teres, and terminates in the 

 basilic vein. This vein is crossed by one or two filaments of the 

 internal cutaneous nerve, and is separated from the brachial artery 

 by the aponeurotic slip given off by the tendon of the biceps. 



AXILLARY VEIN. 



The axillary vein is formed by the union of the vena3 comites of 

 the brachial artery with the basilic vein. It lies in front of the 

 artery, and receives numerous branches from the collateral veins 

 of the branches of the axillary artery, and, at the lower border of 

 the first rib, becomes the subclavian vein. 



* The veins of the fore-arm and bend of the elbow. 1. The radial vein. 2. The 

 cephalic vein. 3. The anterior ulnar vein. 4. The posterior ulnar vein. 5. The trunk 

 formed by their union. 6. The basilic vein, piercing the deep fascia at 7. 8. The median 

 vein. 9. A communicating branch between the deep veins of the fore-arm and the upper 

 part of the median vein. 10. The median cephalic vein. 11. The median basilic. 12. A 

 slight convexity of the deep fascia, formed by the brachial artery. 13. The process of 

 fascia, derived from the tendon of the biceps, and separating the median basilic vein from 

 the brachial artery. 14. The external cutaneous nerve, piercing the deep fascia, and 

 dividing into two branches, which pass behind the median cephalic vein. 15. The in- 

 ternal cutaneous nerve, dividing into branches, which pass in front of the median 

 basilic vein. Ifi. The intercosto-humeral cutaneous nerve. 17. The spiral cutaneous 

 nerve, a branch of the musculo-spiral. 



43 



