428 



THE MUSCLES AND FASCIAE. 



Inner hamstring 



tendons. 



SARTORIUS. 



SEMITENDINOSUS. 

 SEMIMEMBRA- 

 NOSUS. 



Outer 



hamstring 



tendon. 



FIG. 256. Muscles of the hip and thigh. 



This muscle should now be di- 

 vided near its insertion and turned 

 upward, when the Gluteus minimus 

 will be exposed. 



The Gluteus minimus, the 

 smallest of the three Glutei, is 

 placed immediately beneath the 

 preceding. It is fan-shaped, 

 arising from the outer surface of 

 the ilium, between the middle 

 and inferior curved lines, and 

 behind, from the margin of the 

 great sacro-sciatic notch ; the 

 fibres converge to the deep sur- 

 face of a radiated aponeurosis, 

 which, terminating in a tendon, 

 is inserted into an impression on 

 the anterior border of the great 

 trochanter. A synovial bursa is 

 interposed between the tendon 

 and the great trochanter. 



Relations. By its superficial 

 surface, with the Gluteus medius 

 and the gluteal vessels and supe- 

 rior gluteal nerve ; by its deep 

 surface, with the ilium, the re- 

 flected tendon of the Rectus fem- 

 oris, and capsular ligament of the 

 hip-joint. Its anterior margin is 

 blended with the Gluteus niedius ; 

 its posterior margin is in contact 

 and sometimes joined with the 

 tendon of the Pyriformis. 



The Pyriformis is a flat mus- 

 cle, pyramidal in shape, lying 

 almost parallel with the posterior 

 margin of the Gluteus medius. It 

 is situated partly within the pel- 

 vis at its posterior part and partly 

 at the back of the hip-joint. It 

 arises from the front of the sacrum 

 by three fleshy digitations at- 

 tached to the portions of bone 

 between the first, second, third, 

 and fourth anterior sacral fora- 

 mina, and also from the groove 

 leading from the foramina : a few 

 fibres also arise from the margin 

 of the great sacro-sciatic foramen 

 and from the anterior surface of 

 the great sacro-sciatic ligament. 

 The muscle passes out of the 

 pelvis through the great sacro- 

 sciatic foramen, the upper part 

 of which it fills, and is inserted 

 by a rounded tendon into the 

 upper border of the great tro- 



