THE GLUTEAL REGION 



521 



In order to display the peculiar appearances presented by the tendon of this muscle, it must 

 be divided near its insertion and reflected inward. 



Relations. Within the pelvis this muscle is in 'elation, by its deep surface, with the obturator 

 membrane and inner surface of the anterior wall of the pelvis; by its superficial surface, with 

 the pelvic and obturator fascia, which separate it from the Levator ani; and it is crossed by 

 the internal pudic vessels and nerve. This surface forms the outer boundary of the ischio- 



SACROSPINAL 



LIGAMENT WITH 



COCCYGEUS 



MUSCLE 



Fi<;. 388. Muscles of the small or true pelvis on the right side, viewed from without and below. (Spalteholz.) 



rectal fossa. External to the pelvis it is covered by the Gluteus maximus, is crossed by the 

 great sciatic nerve, and rests on the back part of the hip-joint. As the tendon of the Obturator 

 interims emerges from the lesser sacrosciatic foramen it is overlapped by the two Gemelli, while 

 nearer its insertion the Gemelli pass in front of it and form a groove in which the tendon lies. 

 A synovial bursa, narrow and elongated in form, is usually found between the tendon of this 

 muscle and the capsular ligament of the hip; it occasionally communicates with the bursa between 

 the tendon and the tuberosity of the ischium, the two forming a single sac. 



