276 



PRACTICAL ANATOMY. 



oblique, lies in front ot the spermatic cord in the inguinal canal, escapes by the 

 external abdominal ring, and supplies the scrotum and inner side of the thigh. 



3. Gcnito-erural, descends on the front surface of the psoas magnus, divides 

 into a genital and a crural branch ; the genital branch enters the internal abdom- 

 inal ring, lies behind the spermatic cord, and is distributed to the cremaster mus- 

 cle. In the female it goes with the round ligament, supplies the same with 

 motion, and is lost in the labia majora. 



4. The crural branch of this nerve descends on the external iliac artery, lies 

 in the femoral sheath, and is distributed to the skin covering the insertion of the 

 psoas according to Hilton's law. 



GANGLIATED CORD OF SYMPATHETIC 

 LAST THORACIC NERVE 



FIRST LUMBAR 



ILIO- 



HYPOGASTRIC 

 ILIO-INGUINAL 



SECOND 

 LUMBAR 



FOURTH 



LUMBAR 



ILIO-INGUINAL 



EXTERNAL 



CUTANEOUS 



GENITO-CRURAL 

 LUMBO-SACRAL 



CORD 



ANTERIOR CRURAL 

 OBTURATOR 



OBNTTAl. BRANCH 

 OF OEXITO-CRURAL 



CRURAL BRANCH OP 

 GEXITO-CRURAL 



ILIO-INGUINAL 



DISTRIBU- 

 TION OF 

 EXTERNAL 

 CUTANEOUS 



CRURAL 

 BRANCH 

 OF GENITO- 

 CRURAL 



AORTIC PLEAT* 



LAST THORA CIC NER VE 



ILIO-HYPO- 

 QA8ZRIC 



INGUINAL 



THIRD 

 LUMBAR 



GENITO- 

 CRURAL 



EXTERN A L 

 CUTANEOUS 



GENITAL 

 BRANCH 

 OF 



GENITO- 

 CRURAL 



CRURAL 

 HKA.\CH OF 

 (i KM Til 

 CRUMAL 



ourr- 



RATOl 



FIG. 190. BRANCHES OK TIIK I,t MI.AR AND SACRAL PLEXUS, VIIAVKK i ROM BEFORE, 

 (After Hirschfeld and Leveilte.J 



5. External cutaneous, emerges from the outer side ot psoas, crosses iliacus 

 under the iliac fascia, leaves pelvis under crural arch, below anterior superior 

 spine of ilium, pierces deep fascia of thigh, and supplies skin over outer side of 

 thigh, being a dismembered branch of the anterior crural nerve, in reality. 



6. Obturator, emerges from psoas on inner side, lies on outer wall of pelvi 

 leaves pelvis by obturator foramen, divides into .anterior and posterior divisions, 

 separated by the adductor brevis muscle ; the anterior division communicates with 

 the internal cutaneous and long saphcnous nerves, forming the subsartori 

 plexus for the supply of the skin over the insertion of the adductors llilto 



01 



,. 



