422 



MYOLOGY 



The lower margin of the fascia covering the upper surface of the pelvic diaphragm 

 is attached along the line of insertion of the Levator ani. 



At the level of a line extending from the lower part of the symphysis pubis 

 to the spine of the ischium is a thickened whitish band in this upper layer of the 

 diaphragmatic part of the, pelvic fascia. It is termed the tendinous arch or white 

 line of the pelvic fascia, and marks the line of attachment of the special fascia 

 (pars endopelvinafascioe pelvis) which is associated with the pelvic viscera. 



Peritoneum \ 



Vexical layer 



Fascia of 

 urogenital 

 diaphragm 



Rectovesical layer 

 Capsule of 

 prostate 



Rectal layer 



Transversus perincei superficialis 

 Colles' fascia 

 Urogenital diaphragm 

 FIG. 403. Median sagittal section of pelvis, showing arrangement of fasciae. 



The endopelvic part of the pelvic fascia is continued over the various pelvic 

 viscera (Fig. 403) to form for them fibrous coverings which will be described later 

 (see section on Splanchnology) . It is attached to the diaphragmatic part of the 

 pelvic fascia along the tendinous arch, and has been subdivided in accordance 

 with the viscera to which it is related. Thus its anterior part, known as the vesical 

 layer, forms the anterior and lateral ligaments of the bladder. Its middle part 

 crosses the floor of the pelvis between the rectum and vesiculse seminales as the 

 rectovesical layer; in the female this is perforated by the vagina. Its posterior 

 portion passes to the side of the rectum; it forms a loose sheath for the rectum, 

 but is firmly attached around the anal canal ; this portion is known as the rectal 

 layer. 



The Levator ani (Fig. 404) is a broad, thin muscle, situated on the side of the 

 pelvis. It is attached to the inner surface of the side of the lesser pelvis, and unites 



