CUTANEOUS NERVES. 



57 



fascia to ramify on the vessel, and supply the carpal articulations. 

 A little above the middle of the forearm the nerve sends back- 

 wards a branch to the posterior aspect, which reaches nearly to 

 tin- wrist, and communicates with the radial and the following 

 cutaneous nerve (fig. 23). 



The LOWER EXTERNAL CUTANEOUS BRANCH OF THE MUSCULO- external 



SPIRAL NERVE (p. 42) descends along the hinder part of the fore- 



spiral ; 



Supra-acromial. 



Internal cutaneous branch 

 of mnsculo spiral. 



Intercosto-huineral 



Posterior branch of internal 

 cutaneous 



Dorsal branch of ulnar. 



Circumflex. 



Upper external cutaneous branch of 

 nmsculo-spiral. 



Lower external cutaneous branch of 

 inusculo-spiral. 



Posterior branch of musculo- 

 cutaneous. 



Branches of ulnar and median nerves 

 from anterior aspect. 



FIG. 23. NERVES OF THK BACK OF THE ARM. 



arm as far as the wrist. Near its termination it joins the preceding 

 nerve (fig. 23). 



The RADIAL NERVE ramifies in the integument of the back of radial nerve, 

 the hand and some of the digits. It becomes cutaneous at the 

 outer border of the forearm in the lower third, and, after giving 

 some filaments to the posterior aspect of the limb, divides into two 

 branches (fig. 23) : 



One (external) is joined by the musculo-cutaiieous nerve, and is ending by 

 distributed on the radial border and the ball of the thumb. 



The other branch (internal) supplies the remaining side of the 



