290 



PRACTICAL ANATOMY. 



digitations. (Fig. 199.) It leaves the pelvis by the greater sacro-sciatic fora- 

 men, dividing this into an upper and a lower compartment, and is inserted into 



Fyriformi* 



TUBEROSITY 



CoocygeuB 



Coccygeus 



Levator Ani 



FIG. 199. THE SACRUM AND G>< c Y\. (Anterior view. \ 



SACi;rs: 



Pyriformis 



COCCYX 



Levator ani (divided 

 below the ' white line ') 



Space for obturator 

 internus 



RECTUM 

 PROSTATE 



8YMPHYSIS 



agt, for gh 

 vessels and mrrc 



Pyriformis 



1'iixfiti/i' fur xcitilic 

 mil! /mdif vessel* 

 nni! nerve 



ISCHIAL SPINE 



Coecygeus 

 Cellular interval 

 Levator ani 



Capsule of prostate, 

 and pubo-prostatio 

 ligaments 



1 ic. zoo. MUSCLES OF THE FLOOR OK TIIK PELVIS. 



the upper border of the greater trocliantcr. It is an external rotator of th< 

 thigh. Its iicn-c-sitfiply is from the sacral plexus. 



The COCCygeus extends from the spine of the ischium to the anterior snrfaa 



