102 THE POCKET ANATOMY 



Radial : from dorsum of the thumb, radial side of index- 

 finger and hand, along outer side of forearm to join median 

 cephalic near bend of elbow, and form the cephalic vein. 



Median : from palmar surface of hand up the middle of 

 forearm communicating below the bend of elbow, with venae 

 comites of ulnar, and then divides into median cephalic and 

 median basilic. 



Median basilic : passes obliquely inwards over bicipital 

 fascia, which separates it from the brachial artery. Empties 

 into basilic. 



Median cephalic : passes obliquely outwards from bend of 

 elbow, between supinator longus and biceps. Empties into 

 cephalic. 



Basilic : formed by coalescence of anterior and posterior 

 ulnar with the median basilic veins. Ascends on the inner 

 side to middle of the arm, where it pierces deep fascia and 

 joins brachial venae comites to form axillary vein. 



Cephalic : passes up between deltoid and pectoralis major, 

 perforates deep fascia and costo-coracoid membrane, and 

 opens into the axillary vein. It is occasionally connected 

 with the external jugular by a branch over the clavicle 

 (jugulo-cephalic). 



B. DEEP VEINS ACCOMPANYING THEIR RESPECTIVE ARTERIES 

 AS VEN-ffi COMITES, INTERCOMMUNICATING WITH EACH 

 OTHER, AND THE SUPERFICIAL VEINS FREQUENTLY. 



Digital (2) : empty into the superficial palmar. 



Palmar superficial (2) : empty into ulnar and radial. 



Deep palmar : empty into radial venae comites. 



Interosseous (2) : accompany the anterior and posterior 

 interosseous arteries, commencing at the wrist, terminating 

 in venae comites of the ulnar. 



Comites radialis (2) : form, with the ulnar, the comites of 

 brachial. 



Comites ulnaris (2) : with the radial, form comites of brachial. 



Comites brachialis (2) : receiving veins corresponding to the 

 branches of the brachial artery, empty into the axillary vein. 



Axillary (single) : formed by junction of brachial veins 

 with the basilic. Commences at lower border of the axillary 

 space ; receives veins corresponding to branches of its artery, 

 and terminates in the subclavian at outer border ist rib. 

 [Valves at inferior border of subscapularis, terminations of 

 subscapular and cephalic veins.] 



Subclavian : continuation of axillary, joins internal jugular 

 vein behind the inner end of the clavicle to form vena 



