220 



PRACTICAL ANATOMY. 



above superior curved line, posterior surface of 



sacrum and coccyx. 

 Insertion Rough line leading from great trochanter 



to linea aspera and fascia lata. 

 Nerve Small sciatic. 

 GLUTEUS MEDIUS. 



Origin Dorsum of ilium between superior and middle 



curved lines and 



crest of ilium. 

 Insertion Oblique 



line on outer sur- 



face of the great 



trochanter. 

 Nerve Superior glu- 



teal. 



GLUTEUS MINIMUS. 

 Origin From dor- 



sum of ilium be- 



tween middle and 



the inferior curved 



lines. 



Insertion - Anterior 

 /> f 



SUl'iaCe OI 



. 

 fvnpnfl'n rPl* 



FlG 98. DEEP MUSCLES OF GLTJTEAI, 

 REGION. 



\ t ilium; 2, sacral spine: 3. attachment of sacro- 

 iliac ligaments ; 4, tuberosi ty of ischium ; 5, greater 

 sacro-sciatic ligament; 6, lesser sacro-sciatic ligament; 

 7, greater trochanter; 8, glutens miuimus; 9, pyriform; 

 10, superior gemellus ; 11, tendon of obturator interims; 

 12, gemellus inferior ; 13. quadratus femoris ; 14, adduc- 

 tor magnus ; 15, vastus externus ; 16, biceps ; 17, gra- 

 cilia ; 18, semitendinosus. 



PYRIFORMIS. 



Origin From anterior surface of sacrum between 



the anterior sacral foramina. 



Insertion Passes out of the pelvis by the greater 

 sacro-sciatic foramen, and is inserted into the upper 

 border of the great trochanter. 

 Nerve Small sciatic. 

 OBTURATOR INTERNUS. 



Origin Stretched across the obturator foramen is the 



