76 THE POCKET ANATOMY 



Inferior profuuda: arises opposite insertion of coraco- 

 brachialis, accompanies ulnar nerve, pierces internal inter- 

 muscular septum ; anas, posterior ulnar recurrent and anas- 

 tomotic at elbow. 



Anastomotica magna: arises 2 inches above elbow-joint, 

 courses to hollow between olecranon and inner condyle of 

 humerus; anas, inferior profunda, anterior and posterior ulnar 

 recurrent, and a branch across the back of olecranon with 

 superior profunda. Supplies elbow-joint. 



Muscular : to coraco-brachialis, biceps, brachialis anticus. 



THE RADIAL ARTERY. 



Extent. From bifurcation of the brachial to ending of the 

 deep palmar arch of hand ; accompanied by venae comites. 



Relations in the forearm. In front. Integument, fascia, 

 supinator longus. 



Behind. Tendon of biceps, supinator brevis, pronator radii 

 teres, flexores sublimis digitorum et longus pollicis, pronator 

 quadratus, lower end of radius. 



Inner side. Pronator radii teres, flexor carpi radialis. 



Outer side. Supinator longus tendon, and for middle rd, 

 radial nerve. 



The artery courses along inner border of supinator longus 

 tendon to carpus, winds round carpus beneath extensors of 

 thumb and radial nerve, lying on external lateral ligament of 

 wrist, scaphoid and trapezium, enters palm of hand through 

 the heads of the ist dorsal interosseous muscle, forming deep 

 palmar arch. 



Branches : 



Radial recurrent: arises just below elbow, ascends to 

 between brachialis anticus and supinator longus, supplying 

 them and the elbow-joint ; anas, superior profunda. 



Muscular : to muscles attached to radial side of forearm. 



Superficial volar : arises when the artery is about to wind 

 round carpus, passes between muscles of ball of thumb; anas. 

 with ulnar, completing superficial palmar arch. 



Anterior carpal : arises near lower border of pronator 

 quadratus, passes inwards under tendons ; anas, anterior 

 carpal of ulnar. 



Posterior carpal : arises beneath extensor tendons of thumb : 

 mas. posterior carpal of ulnar, forming posterior carpal arch , 

 which gives off 2nd and 3rd dorsal interosseous to 3rd and 4th 

 spaces ; and anas, with superior perforating of deep arch, and 

 at lower end of interosseous space gives off inferior per- 

 forating to join palmar digital arteries. 



