SYNOPSIS OF CUTANEOUS NERYES. 683 



and on the buttock the distribution of the lumbar nerves extends to the 

 trochanters. 



The area supplied by the cervical plexus, besides extending upwards, as 

 already mentioned, on the lateral part of the skull, stretches over the 

 front and sides of the neck, and the upper part of the shoulder and breast. 



The area of the anterior divisions of the dorsal and Jirst lumbar nerves meets 

 superiorly with that of the cervical plexus, and posteriorly with that of the 

 posterior divisions of dorsal and lumbar nerves. It passes down over the 

 haunch and along by the outer part of Pou part's ligament, and includes 

 part of the scrotum and a small portion of the integument of the thigh 

 internal to the saphenous opening. 



The perinceum and penis are supplied by the pudic nerve ; the scrotum by 

 branches of the pudic, inferior pudendal, and ilio- inguinal nerves. 



UPPER LIMB. The shoulder, supplied superiorly by the cervical plexus, 

 receives its cutaneous nerves iuferiorly as far as the insertion of the deltoid 

 from the circumflex nerve. 



The arm internally is supplied by the intercosto-humeral nerve and the 

 nerve of Wrisberg. The iuner and anterior part is supplied by the internal 

 cutaneous nerve ; and the posterior and outer part by the internal and 

 external branches of the musculo-spiral nerve. 



The forearm, anteriorly and on the outer side, is supplied by the 

 external cutaneous ; on its outer and posterior aspect, superiorly by the 

 external cutaneous branches of the musculo-spiral, and inferiorly by the 

 radial branch of the same nerve. On the inner side, both in front and 

 behind, is the internal cutaneous nerve, and inferiorly are branches of the 

 ulnar. 



On the back of the hand are the radial and uluar nerves, the radial 

 supplying about three fingers and a half or less, and the uluar one and a 

 half or more. 



On the front of the hand, the median nerve supplies three fingers and a 

 half, and the ulnar one and a half. In the palm is a branch of the median 

 given off above the wrist. On the ball of the thumb are branches of the 

 mu- culo-cutaneous, median, and radial nerves. 



LOWER LIMB. The buttock is supplied from above by the cutaneous 

 branches of the posterior divisions of the lumbar nerves, with the ilio-hypo- 

 gastric and lateral branches of the last dorsal nerves ; internally by the 

 posterior divisions of the sacral nerves ; externally by the posterior branch 

 of the external cutaneous nerve proceeding from the front ; and inferiorly 

 by branches of the small sciatic nerve proceeding from below. 



The thigh is supplied externally by the external cutaneous nerve ; 

 posteriorly, and in the upper half of its ii.ner aspect, by the small sciatic ; 

 anteriorly, and in the lower half of the inner aspect, by the middle and 

 internal cutaneous. 



The leg is supplied posteriorly by the small sciatic and short saphenous 

 nerves ; internally by the long saphenous and branches of the internal 

 cutaneous of the thigh ; and outside and in front by cutaneous branches of 

 the external popliteal nerve, and by its musculo- cutaneous branch. 



On the dorsum of the foot are the branches of the mu^culo-cutaneous, 

 supplying all the toes with the exception of the adjacent sides of the first 

 and second, which are supplied by the anterior tibial, and the outer side of 

 the little toe, which, with the outer side of the foot, is supplied by the short 

 saphenous nerve. The long saphenous is the cutaneous nerve on the inner 

 side of the foot. 



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