158 ORIGIN, INSERTION, AND USE 



minates in a thin, delicate tendon, which unites to the 

 gracilis. 



Insertion. — Into the inner and upper part of the tibia. 



Use. — To assist in bending the leg ; and, when bent, to 

 rotate the head of the tibia inwards. 



GRACILIS. 



Placed upon the inside of the haunch. 



Origin. — Tendinous and fleshy, from the symphysis 

 pubis, and inner edge of the descending ramus of the pubis. 

 It forms that remarkable prominence upon the inside of the 

 thigh. 



Insertion. — Into the inner and upper part of the tibia. 



Use. — To flex and rotate the tibia inwards. 



PECTINEUS. 



Origin. — From the upper margin of the pubis, near the 

 symphysis. 



Insertion. — Into the trochanter internus. 



Use. — To flex the haunch, and at the same time abduct it. 



TRICEPS FEMORIS. 



It has, as its name implies, three heads, which are called 

 abductor brevis, abductor longus, and abductor magnus. 



Insertion. — Into the pubes and tuberosity of the ischium, 

 tibia, and expansions of the gracilis and sartorius. 



Use. — They act as abductors. 



GLUTEAL REGION 



Includes the three gluteal muscles, and they compose the 



upper part of the quarter. 



\ 



GLUTEAL EXTERNUS. 



This muscle corresponds, as far as regards its relative situa- 

 tion, to the gluteus maximus of the human subject. 



It originates from the third spinous process of the sacrum, 





