THE SACRAL AND COCCYGEAL NERVES 



967 



It gives off the following branches: 



Perforating cutaneous 



Pudendal 



Visceral .... 



Muscular .... 



Anococcygeal 



2,3S. 



2, 3, 4 S. 



3,4S. 



4S. 



4, 5 S. and Cocc. 



LATERAL FEMORAL.... 



FIFTH 

 LUMBAR 



EXTERNAL SPER- 

 MATIC BRANCH OF 

 GENITO-CRURAL 

 LUMBO-INGUINAL 



BRANCH OF-- 

 GENITO-CRURAL 



LEFT DORSAL- 



DORSAL NERVE 



OF PENIS 



SYMPATHETIC 



TRUNK 



LUMBO-SACRAL 

 CORD 



jrA on SUPERIOR 



^*~ 19 ' QLUTEAL 



. , RAMUS 



COMMUNICAN9 



VISCERAL 

 BRANCHES 

 NERVE TO 



LEVATOR ANI 



...HEMORRHOIDAL BRANCH 

 OF PUDIC 



'PUDENDAL 

 PERINEAL 

 ...POST. FEMORAL 



EXTERNAL SUPER- 

 FICIAL PERINEAL 

 INTERNAL SUPER- 

 FICIAL PERINEAL 



NERVE TO BULB 



INFERIOR 

 PUDENDAl 



FIG. 837. Sacral plexus of the right side. (Testut). 



The Perforating Cutaneous Nerve (n. clunium inferior medialis) usually arises from 

 the posterior surface of the second and third sacral nerves. It pierces the lower 

 part of the sacrotuberous ligament, and winding around the inferior border of the 

 Gluta?us maximus supplies the skin covering the medial and lower parts of that 

 muscle. 



The perforating cutaneous nerve may arise from the pudendal or it may be absent; in the 

 latter case its place may be taken by a branch from the posterior femoral cutaneous nerve or by 

 a branch from the third and fourth, or fourth and fifth, sacral nerves. 



The Pudendal Nerve (n. pudendus; internal pudic nerve) derives its fibers from the 

 ventral branches of the second, third, and fourth sacral nerves. It passes between 

 the Piriformis and Coccygeus muscles and leaves the pelvis through the lower part 

 of the greater sciatic foramen. It then crosses the spine of the ischium, and 

 reenters the pelvis through the lesser sciatic foramen. It accompanies the internal 

 pudendal vessels upward and forward along the lateral wall of the ischiorectal 



