78 THE POCKET ANATOMY 



Branches : 



Anterior ulnar recurrent : arises near bifurcation of 

 brachial, ascends between brachialis anticus and pronator 

 radii teres, supplying them ; anas, inferior p'rofunda, anas- 

 tomotic. 



Posterior ulnar recurrent : arising below the anterior, passes 

 beneath flexor sublimis, ascends behind inner condyle, thence 

 between heads of flexor carpi ulnaris, supplying joint and 

 muscles around; anas, inferior profunda, anastomotic. 



Common interosseous : about half an inch long, arising just 

 below radial tubercle, passes to interosseous membrane, there 

 dividing into two terminal branches. 



Branches : 



Anterior interosseous : passes down forearm, resting upon 

 anterior surface of interosseous membrane, accompanied by 

 and internal to interosseous branch of median nerve. At 

 upper border of pronator quadratus one branch, the anterior 

 communicating, goes downwards beneath quadratus to anas. 

 with anterior carpal and deep arch : the other piercing in- 

 terosseous membrane descends to back of carpus ; anas, pos- 

 terior interosseous, posterior carpal of radial and ulnar. 

 Supplies nutrient branches to radius and ulna, and branch to 

 median nerve : comes nervi mediani. 



Posterior interosseous : passes backwards between oblique 

 ligament and interosseous membrane, and between supinator 

 brevis and extensor ossis metacarpi pollicis, runs down back 

 of forearm, lying internal to posterior interosseous nerve, 

 between superficial and deep muscular layers as far as the 

 wrist ; anas, posterior carpal of radial and ulnar, anterior 

 interosseous. 



Branch : 



Posterior interosseous recurrent : given off near origin, passes 

 under anconeus to interval between olecranon and external 

 condyle ; anas, superior profunda, anastomotic. 



Muscular : to muscles on ulnar side of forearm. 



Anterior carpal : courses beneath tendons of flexor pro- 

 fundus ; anas, anterior carpal of radial. 



Posterior carpal : arises just above pisiform, winds back 

 beneath flexor carpi ulnaris tendon, gives branch to inner 

 side of 5th metacarpal, and then passes outwards to anas. 

 with posterior carpal of radial, forming posterior carpal arch 

 (vide Radial Artery). 



Superficial palmar arch : continues the ulnar in the hand, 

 lying immediately under palmar fascia and on digital nerves 

 and flexor tendons. It turns outwards a little below the 



