626 



HUMAN ANATOMY. 



Nerve-Supply. — From the anterior crural nerv^e by the second and third 



lumbar nerves. 



Action.— To adduct and flex the thigh and rotate it slighdy outward. 



Fig. 600. 



Anterior 

 superior 

 spine of 

 ilium 



Tensor fasciae 

 latae 



Femoral artery 

 Femoral vein 



Sartorius 



Cut edge of 

 fascia lata 



Aponeu- 

 rosis of 

 external 

 oblique 



—Poupart's 

 ligament 



S~Spine of 

 pubis 



■Pectineus 



Adductor 

 longus 



Gracilis 



Ilio-tibial— 

 band 



Rectus 

 femoris 



Variations. — The fibres which in- 

 nervate the pectineus sometimes pass 

 to it wholly or partly by the obturatoi 

 nerve. 



4. Gracilis (Fig. 600). 



Attachments. — The gra- 

 cilis is a long band-like muscle 

 which arises from the anterior 

 surface of the body and inferior 

 ramus of the pubic bone. It de- 

 scends along the inner surface of 

 the thigh, passes behind the inner 

 condyle of the femur, and then, 

 bending slightly forward, is z«- 

 scrted into the inner surface of 

 the tibia near the tuberosity, just 

 above the semitendinosus and be- 

 hind and beneath the expanded 

 tendon of the sartorius. 



Nerve-Supply. — By the 

 anterior division of the obturator 

 nerve from the second, third, and 

 fourth lumbar nerves. * 



Action. — To adduct the leg 

 and flex the thigh. It will also 

 assist in rotating the leg inward, 

 especially if the thigh be ilexed. 



5. Adductor Longus (Fig. 

 600). 



Attachments. — The ad- 

 ductor longus arises from the an- 

 terior surface of the body and 

 superior ramus of the pubis and 

 passes downward and laterally to 

 be inserted into about the middle 

 third of the inner lip of the linea 

 aspera of the femur. 



Nerve-Supply. — By the 

 anterior division of the obturator 

 nerve from the second and third 

 lumbar nerves. 



Action. — To adduct, flex, 

 and outwardly rotate the thigh. 



6. Adductor Brevis (Fig. 

 601). 



Attachments. — The ad- 

 ductor brevis arises from the body 

 and inferior ramus of the pubic 

 bone, below and partly external 

 to the origin of the adductor longus. It passes laterally and obliquely downward to 

 be inserted into the upper third of the medial lip of the linea aspera of the femur. 



\"astu 

 externus 



■Vastus internus 



Sartorius 



Tendon of 

 extensor 

 quadriceps 



Aponeurosis 

 of extensor 

 quadriceps 



Tendo patellae 



Muscles of right thiijh, antero-median aspect. 



