EXTERNAL FEMORAL REGION. 239 



ADDUCTOR LONGUS. 



(Subpubio-femoralis Posterior. ) 



(Fie. 76. h.) 



Situated on the inner aspect of the thigh, covered by the 

 gracilis, this muscle is long, flat, and prismatic, extending outwards 

 and downwards. 



Origin. From the inferior surface of the posterior part of the 

 pubis. 



Insertion. By two divisions, one attached by the insertion of 

 the brevis, the other, with the magnus, above the internal condyle 

 of the femur at the attachment of the lateral ligament. 



Relation. Anteriorly with the brevis and obturator externus ; 

 posteriorly with the magnus ; externally with the gracilis ; inter- 

 nally with the ischio-femoralis and sciatic nerves. The femoral 

 vessels pass between its two divisions. 



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



ADDUCTOR MAGNUS. 



(Semimembranosus Ischio-tibialis.) 

 (Fie. 76. i.) 



Placed behind the preceding, on the postero-internal part of the 

 thigh, this muscle is thin at its extremities and posterior border, 

 thick and fleshy elsewhere, terminating in a short tendon. 



Origin. Chiefly from the inferior surface and tuberosity of 

 the ischium by tendinous fibres, and by a slender band from the 

 coccygeal fascia. 



Insertion. To a small roughened surface on the inner side 

 of the internal condyle of the femur. 



Relation. Anteriorly with the longus, to which it is very 

 adherent ; externally with the gracilis ; posteriorly with the biceps 

 rotator tibialis ; internally with the triceps abductor. 



Action. To adduct and extend the thigh. If the limb be 

 fixed, it assists in raising the anterior parts of the trunk in 

 " rearing." 



EXTERNAL FEMORAL REGION. 



ABDUCTORS. 



This region contains only one muscle, which is situated laterally 

 with respect to the haunch, but more posteriorly with regard to 

 the femur. 



