GLUTEAL REGION. Zoo 



vexity, over which it passes, v/ith au interposed synovial bursa ; 

 a small fleshy insertion is often found posteriorly. 



Relation. — Externally with the externus and the fascia ; 

 internally with the iuternus, sacro-sciatic ligament, and the 

 ilium ; anteriorly with the fascia lata and the longissimus dorsi ; 

 posteriorly with the triceps abductor femoris. The inner and 

 anterior portion which terminates in the anterior tendon has 

 been rather unnecessarily described as a separate muscle ; this 

 possible separation is shown in Fig. 83. a. 



Action. — To extend the femur on the pelvis, and, when the 

 posterior limbs are fixed, to assist in rearing. 



Fig. S3. 



neep-seated muscles of the gluteal region, a. Deep anterior portion 

 of gluteus maximus ; h, Gluteus internus ; c, Common tendon of obturator 

 internus and pyriformis ; d d, Gemellus anticus and posticus ; e, Ischio- 

 femoralis. 



GLUTEUS INTERNUS. 



{Ilio-frochdiUeriiis Parvus. ) 



(Fig. 83.6.) 



Situated underneath the maximus and above the hip joint, 

 this is a short and fan-shaped muscle, the fibres converging 

 outwards. 



Origin.- — From the shaft of the ilium, the ischiatic spine, and 

 the capsular ligament of the hip joint. 



