238 MYOLOGY. 



Origin. — From the brim and inferior surface of the pubis ; it 

 is also attached to the pubio-femoral ligament, which passes 

 through its tendons of origin. 



Insertion. — To a roughened surface on the inner side of the 

 femur, below the internal trochanter, and near the nutrient fora- 

 men. 



Relation. — Anteriorly with the sartorius, part of the psoas 

 magnus, iliacus, and vastus iuternus ; posteriorly with the adductor 

 brevis and gracilis ; superiorly with the obturator externus. The 

 femoral vessels cross it. 



Actiun.- 

 wards. 



TRICEPS ADDUCTOR FEMORIS. 



This name has been applied to a group of three muscles, situ- 

 ated on the inner surface of the thigh, and covered by the gracilis, 

 which act the part of adductors. They have also been described 

 as consisting of a biceps and a single muscle ; we describe them 

 as three distinct muscles, and name them, from before backwards, 

 the brevis, the longus, and the magnus. 



ADDUCTOR BREVIS. 



{Subpiihio-femoralis. ) 



(Fig. 76. g.) 



Situated on the inner aspect of the thigh, behind the pec- 

 tineus, this muscle is pyramidal, with the base upwards, its fibres 

 converging downwards and outwards. Fleshy, with tendinous 

 insertions inferiorly, it is often somewhat blended with the 

 longus. 



Origin. — Superiorly from the inferior surface of the pubis. 



Insertion. — To a square, roughened surface on the posterior 

 part of the shaft of the femur, about the middle, together with a 

 portion of the long adductor. 



Relation. — Anteriorly with the pectineus ; posteriorly with the 

 longus ; externally with the gracilis ; internally with the obturator 

 externus. 



Action. — To flex, adduct, and rotate the femur outwards. 



