942 



NEUROLOGY 



Axillary 



Radial 



The articular branches to the elbow-joint are several small filaments which arise 

 from the nerve as it lies in the groove between the medial epicondyle and olecranon. 



The muscular branches (rami 

 musculares) two in number, arise 

 near the elbow : one supplies the 

 Flexor carpi ulnaris; the other, 

 the ulnar half of the Flexor 

 digitorum profundus. 



The palmar cutaneous branch 

 (ramus cutaneus palmaris) arises 

 about the middle of the forearm, 

 and descends on the ulnar artery, 

 giving off some filaments to the 

 vessel. It perforates the volar 

 carpal ligament and ends in the 

 skin of the palm, communicating 

 with the palmar branch of the 

 median nerve. 



The dorsal branch (ramus dor- 

 salis manus} arises about 5 cm. 

 above the wrist; it passes back- 

 ward beneath the Flexor carpi 

 ulnaris, perforates the deep fas- 

 cia, and, running along the ulnar 

 side of the back of the wrist 

 and hand, divides into two dor- 

 sal digital branches; one supplies 

 the ulnar side of the little finger; 

 the other, the adjacent sides of 

 the little and ring fingers. It 

 also sends a twig to join that 

 given by the superficial branch 

 of the radial nerve for the ad- 

 joining sides of the middle and 

 ring fingers, and assists in sup- 

 plying them. A branch is dis- 

 tributed to the metacarpal region 

 of the hand, communicating 

 w r ith a twig of the superficial 

 branch of the radial nerve (Fig. 

 813). 



On the little finger the dor- 

 sal digital branches extend only 

 as far as the base of the ter- 

 minal phalanx, and on the ring 



FIG. 818. The suprascapular, axillary, and radial nerves. finger as far as the base of the 



second phalanx; the more distal 



parts of these digits are supplied by dorsal branches derived from the proper volar 

 digital branches of the ulnar nerve. 



The volar branch (ramus volaris manus) crosses the transverse carpal ligament 

 on the lateral side of the pisiform bone, medial to and a little behind the ulnar 

 artery. It ends by dividing into a superficial and a deep branch. 



The superficial branch (ramus superficialis [n. ulnaris] (supplies the Palmaris 

 brevis, and the skin on the ulnar side of the hand, and divides into a proper volar 



