1 64 THE POCKET ANATOMY 



flattened, and divides into two parts to supply the outer 

 31 fingers. 



Branches in the Forearm : 



Articular: to elbow-joint. 



Muscular : to pronator radii teres, flexor carpi radialis, 

 palmaris longus, and flexor sublimis digitorum. 



Anterior interosseous : is given off just below the elbow-joint. 

 It, passes down external to the anterior interosseous artery 

 on the membrane, between the flexor profundus and flexor 

 longus pollicis, to end in the deep surface of pronator quad- 

 ratus. Supplies flexor longus pollicis, pronator quadratus, 

 and outer half of flexor profundus digitorum. 



Palmar cutaneous : pierces fascia just above angular ligament, 

 ends in the integument of the palm, joining the palmar 

 cutaneous of the ulnar nerve. 



Terminal branches in the Hand : 



Muscular to thumb : supplies abductor, opponens, and outer 

 head of flexor brevis pollicis. 



Digital : five in number, supplying outer 3^ fingers, ist 

 and and supply the thumb, 3rd to radial side of index finger 

 also supplies ist lumbrical; 4th supplies and lumbrical 

 and adjacent side of index and middle fingers ; 5th supplies 

 adjacent sides of ring and middle fingers, and joins a branch 

 of the ulnar, giving sometimes a branch to the 3rd lumbrical. 



Ulnar (inner cord) : passes down the inner side of axillary 

 and brachial arteries to middle of arm ; it then runs with 

 inferior profunda artery through internal intermuscular 

 septum to groove between olecranon and internal condyle. 

 Thence it passes through the two heads of the flexor carpi 

 ulnaris and descends under cover of that muscle, along ulnar 

 side of forearm and internal to ulnar artery, as far as the 

 pisiform bone ; it then courses over the annular ligament 

 external to that bone, and divides into superficial and deep 

 palmar branches. 



Branches in the Forearm : 



Articular : to elbow and wrist joints. 



Muscular : to flexor carpi ulnaris and inner half of flexor 

 profundus digitorum. 



Cutaneous : arises near middle of forearm, and divides into: 

 superficial to integument of forearm, and palmar, accompanies 

 ulnar artery to hand, supplying the palm : joins the 

 cutaneous of median. 



Dorsal cutaneous : comes off about 3 inches above pisiform 

 bone, winds round ulna beneath flexor carpi ulnaris, supplies 

 inner side of little finger, and adjacent sides of ring and little 

 fingers on the dorsal aspect. 



