-152 



Spinal Nerves. 



M. -flex, digit. 

 subL. et prof 



M.-fbx.carp.uIn: 



Wl. flex, carp. pad. 



N. MEDIAN. 



N. ULNAR. 



R.VOLAR.PROFUND 



R.VOLAR. SUPERB 



Anastomosis 



M. flex. brev. 

 digit, mitv 



496. The Nerves at the Palmar Side of the Hand. 



ficial, lying between the tendons of the MM. flexor digitorum sublimis 

 and flexor carpi radial is. It then passes with the tendons of the flexor 

 sublimis beneath the annular ligament into the palm of the hand, where 

 it divides into four digital branches, Nervi digitorum volares. The 

 first supplies the small muscles of the thumb and the skin on its radial 

 side ; the other three supply the first three MM. himlricales, and the inte- 

 gument on the contiguous sides of the thumb, and the second, third and 

 fourth fingers. One branch communicates with the volar branch of the ulnar 

 nerve. In the upper arm the median nerve has no branches ; in the 

 forearm: muscular branches for the superficial flexor muscles (except 

 M. flexor carpi ulnaris) ; a communicating b r a n c h for the external 

 cutaneous nerve; also the anterior or internal inter osseous, 

 N. intcrosscus interims, which passes down to the M. pronator quadratus ; 

 finally a palmar cutaneous branch, N. cutaneus antibracldi palmaris 

 (see Fig. 494). 



