THE CERVICAL NERVES 



939 



communicates with a branch from the ulnar nerve and sometimes sends a twig 

 to the third Lumbricalis. 



Each proper digital nerve, opposite the base of the first phalanx, gives off a 

 dorsal branch which joins the dorsal digital nerve from the superficial branch of 

 the radial nerve, and supplies the integument on the dorsal aspect of the last 

 phalanx. At the end of the digit, the proper digital nerve divides into two 

 branches, one of which supplies the pulp of the finger, the other ramifies around 

 and beneath the nail. The proper digital nerves, as they run along the fingers, are 

 placed superficial to the corresponding arteries. 



POSTERIOR BRANCH 

 OF RADIAL 



MEDIAN 



ANTERIOR BRANCH 



OF RADIAL 



PALMAR CUTANEOUS 



OF MEDIAN 



MUSCULAR TO ABDUCTOR, 



OPPONENS, AND PLEXOR 



BREVIS POLLICIS 





COLLATERALS 

 TO THUMB 



DEEP BRANCH 

 OF ULNAR 



rt_SUPERFICIAL BRANCH 

 OF ULNAR 



COMMUNICATING 

 TO MEDIAN 



FIG. 815. Superficial palmar nerves. (Testut.) 



The Ulnar Nerve (n. ulnaris) (Fig. 816) is placed along the medial side of the limb, 

 and is distributed to the muscles and skin of the forearm and hand. It arises 

 from the medial cord of the brachial plexus, and derives its fibers from the eighth 

 cervical and first thoracic nerves. It is smaller than the median, and lies at first 

 behind it, but diverges from it in its course down the arm. At its origin it lies 





