234 MYOLOGY. 



Insertion. By a tendon to a roughened space inside the con- 

 vexity of the trochanter major of the femur. 



Relation. Externally with the maximus ; internally with the 

 femur and hip joint. 



Action. To abduct the thigh, and rotate it inwards. 



RECTUS PARVUS. 

 (Ilio-femorolis Parvus Grele.) 



Situated in front of the hip joint, this is a very small, pale, 

 and fusiform muscle, with a fleshy belly, and tendinous ex- 

 tremities. 



Origin. From the brim of the acetabulum, towards the out- 

 side ; or it may be by two origins, an outer one, and one from 

 between the tendons of origin of the rectus femoris, and the 

 capsular ligament of the hip joint. 



Insertion. To the anterior and upper part of the femur, just 

 below the hip joint, by aponeurotic slips. 



Relation. Externally and internally with the rectus femoris ; 

 posteriorly with the capsular ligament. 



Action. To tense the capsular ligament of the hip joint 

 during flexion of the femur. 



OBTURATOR EXTERNUS. 

 (Subpubio-trochanterius Externus. ) 



Placed on the inferior surface of the os innominatum, below 

 the obturator foramen, which it covers, this muscle is flat, thick, 

 and triangular, its belly consisting of delicate fasciculi, which 

 pass outwards. 



Origin. From the surface of the pubis and ischium, attached 

 to the obturator ligament. 



Insertion. In the trochanteric fossa. 



Relation. Inferiorly with the pectineus and adductors ; 

 superiorly with the capsular ligament of the hip joint and 

 obturator ligament ; posteriorly with the triceps abductor and 

 ischio-femoralis. 



Action. To rotate the femur outwards, and adduct it. 



