io6 OUTLINES OF ANATOMY. 



Draw the pelvic organs forward and expose the sacral and coccygeal nerves. Trace the branches to 

 their distribution or to the place of exit from the pelvic cavity. 



Sacral and coccygeal nerves, 853; Fig. 465. (833) 

 Fourth sacral nerve : 



Perforating cutaneous branch. 

 Perinaeal branch. 



Branches to coccygeus and levator ani. 

 Coccygeal plexus, 854. (834) 

 Anterior branches. 

 Posterior branches. 

 Coccygeal nerve. 



Sacral plexus; great sciatic nerve, pudic nerve, 854; Fig. 465. (834) 

 "Branches of the sacral plexus," collateral and terminal. 

 Collateral branches: 



Superior gluteal nerve, 854-5. (835) 

 Inferior gluteal nerve, 855. (835-6) 

 Nerve to the pyriformis, 855. (836) 

 Visceral branches. 



Nerve to the quadratus, 855-6. (836) 

 Small sciatic, 856-7. (837-8) 

 Nerve to the obturator internus, 857. (837-8) 

 Terminal branches: 



Great sciatic nerve, 858. (838-9) 

 Pudic nerve, 857-8. (838) 



Expose the hypogastric plexus and the sacral portion of the gangliated cord and note the branches of 

 communication with the sacral plexus. So far as possible, trace the branches of distribution to the 

 pelvic viscera. 



Hypogastric plexus, 871. (852) 

 Pelvic plexuses, 873. (852-3) 

 Middle hemorrhoidal plexus. 

 Vesical plexus: 

 Superior group. 

 Inferior group. 



Nerves to the vas deferens (male). 

 Prostatic plexus (male). 



Small cavernous nerve. 

 Large cavernous nerve. 

 Vaginal plexus (female). 

 Uterine plexus (female). 



Sacral part of the gangliated cord, 869. (849) 

 Kami communicantes. 

 Branches. 

 Male. Suspensory ligament of the penis. Angle of the penis, 1070. (1047) 



Remove the organs from the pelvic cavity and study their structure. To remove the organs, divide the 

 vessels and nerves passing to them ; draw the bladder and rectum away from the pelvic walls and care- 

 fully sever the connecting fascia and ligaments ; (in the male; draw the penis downward and free it 

 from its attachments to the pubic arch, cutting the crura and ligaments close to the arch) ; finally, divide 

 the levator and sphincter ani muscles. The left kidney and ureter should be removed with the 

 bladder. 



Carefully separate the rectum from the bladder (and prostate, in the male ; uterus and vagina, in the 

 female) ; inflate it and demonstrate the internal sphincter, and its coats. 



The rectum, 101112. (989-90) 

 The anus. 



Divide the left kidney by a vertical incision, extending from the outer border nearly to the hilum, open- 

 ing the sinus and exposing the interior of the pelvis. Insert the blowpipe in the pelvis of the kidney 

 and inflate the bladder through the ureter, a ligature being placed around the urethra. Clean the 

 surface of the bladder (remove the bladder from the vagina and uterus, in the female), exposing the 

 terminal portion of the ureters, also the vas deferens and the vesiculae seminales, then carefully expose 

 the prostate and the membranous portion of the urethra, with Cowper's glands. (In the female, ex- 

 pose the ureters and urethra.) 



