LIGAMENTS AND MUSCLES OF THE HOUSE. 49 



Gluteus Externus. 



Origin.— Anteriorily from the. external angle of the ilium ; pos- 

 teriorly from the gluteal fascia. 



Insertion. — To the trochanter minor externus of the femur. 



Action. — To abduct and flex the femur ; when the leg is fixed, it 

 assists in rearing. 



Gluteus Maximus. 



Origin. — From the aponeurosis of the longissimus dorsi, from 

 the upper surface of the ilum, from the sacro-iliac and 

 sacro-sciatic ligaments, and from the g'uteal fascia. 



Insertion. — By one tendon to the summit of the great troch- 

 anter, by another passing over the convexity to V)e attached 

 to a ridge below it, and by a fleshy slip to the l)ack of the 

 trochanteric ridge. 



Action. — To extend and abduct the femur ; when the limb is 

 fixed, to assist in rearing. 



Xote. — A synovial bursa is interposed between the second ten- 

 don of insertion and the convexity. 



Gluteus Internus. 



Origin. — From the superior ischiatic spine, and tlie adjacent 

 upper surface of the ilium. 



Insertion. — To the inner side of the convexity of the great 

 trochanter. 



Action.— It abducts the femur and rotates it inwards. 



ANTERIOR FEMORAL REGION. 



1. Tensor fasciae latcf. 



2. Bectus/emoris. 1 



3. Vastus externus. ,- Triceps cruralis. 



4. Vastus internus. j 



5. Rectus parvus 

 Tensor Fascle Lat.e. 



Origi7i. — From the external angle of the ilium. 

 Insertion. — To the fascia lata. 



