'///A' I '1:1 A' IS. 



281 



9. This union is called sacral plexus to the lower margin of the greater s.. 

 sciatic foramen, wlierc it continues its course under the name of great sciatic nei 



IO. Tlie .<mrnl iicrvt-s all send rami communicantes to the pelvic sympathetic 

 plexus, which you have already found, located to the inner side of the anterior 

 sacral foramina, by the side of the rectum and bladder. 



1 ^section : ( i ) Trace the first, second, and third sacral nerves as far into the 

 sacral foramina as possible. Notice! This must be done with a blunt forceps, 



TWELFTH RIB 



LAST THORACIC NERVE 



P.oaa 



ILIO- 

 HYPOOASTBIC 



Dura mater of cord 



POSTKKtnit PKIMART 

 DIVISION 



QEX1TO-CRURAL 



GAUD A EQVINA 



Filum terminale 



EXTERNAL 

 CUTANEOUS 



'7 OBTURATOR 



LVMBO-SACRAL CORD 



FIRST SACRAL 

 NERVE 



FIFTH SACRAL 

 NER VE 



VISCERAL BRANCHES 



"rtery 



Small aaoro-Bdatio 

 liKament 



ILIAC BRANCH 



111-' ILllt- 

 IIYPUOAKTRIC 



OluteuB madiuB 



Gluteat artery 

 SUPERIOR 

 OLUTEAL NERVE 



' i i: i:.(T SCI A TIC XER I 'A 



INFERIOR OLUTEAL 



M:RVE 



SMALL SCIATIC NER\'E 



THIRD SACRAL 

 NERVES 



Kn;. 194. A I.>ISS|..CTII>N OK THK LUMBAR AND SACRAL PLEXUSES, FROM DKHIND. 

 (The anterior crural nerve is placed between the external cutaneous and obturator nerves.) 



and with a very delicate touch, to avoid injuring the small branches given off to 

 the sympathetic pelvic part of the gangliated cord. After this is clone, all the 

 fat must be dissolved by ether, benzene, or gasoline. (2) Now dissect in the 

 direction of the branches given off, and find the following : 



KKRVE TO 

 OBTURA TOR 

 INTERNUH 



PER FOR A TINC, 

 CUTANEOUS OF 



BRANCHES OF THE SACRAL PLEXUS. 



i. Tlic litwbo-sacml cord is the communication between the sacral and lum- 

 bar plexuses. It is formed by the fifth lumbar and part of the fourth lumbar 

 iq 



