CEKVICAL NEKVES. 693 



The first four cervical nerves, by means of the cervical plexus, innervate the neck ; 



FIG. 609. THE DISTRIBUTION OF CUTANEOUS NERVES ON THE FRONT OF THE TRUNK. 

 On one side the distribution of the several nerves is represented, the letters indicating their nomenclature. 



Gr.A, Great auricular nerve ; S.C, N. cutaneus colli ; S.CL, Supra- clavicular nerves ; ACR, Posterior ; CL, Middle ; 

 ST, Anterior ; T.2-12, Lateral and anterior branches of thoracic nerves ; I.H, Ilio-hypogastric nerve ; 

 I.I, Ilio-inguinal nerve ; CIRC, Cutaneous branch of axillary nerve ; L.I.C, Medial cutaneous nerve of the 

 arm (lesser internal cutaneous nerve) ; I.H, Intercosto-brachial ; I.C, Medial cutaneous nerve of the fore- 

 arm (internal cutaneous) ; M.S, Cutaneous branch of radial nerve ; E.C, Lateral cutaneous nerves ; G.C, 

 Lumbo-inguinal nerve ; M.C 1 2 , Intermediate cutaneous nerves ; I.C 1 , Branch of medial cutaneous nerve ; 

 P, Branches of pudendal nerve ; S.Sc, Branches of posterior cutaneous nerve of the thigh. 



On the other side a schematic representation is given of the areas supplied by the above nerves, the numerals 

 indicating the spinal origin of the branches of distribution to each area. 



the last four cervical nerves, together with a large part of the first thoracic nerve, 



