THE MUSCLES ON THE MEDIAL SIDE OF THE THIGH. 413 



whole length of the linea aspera; (3) into the medial epicondylic line of the 

 femur ; (4) into the adductor tubercle on the medial condyle of the femur : 

 and (5) into the medial ' intermuscular septum (Fig. 365, p. 410). The part of 

 the muscle attached to the space proximal to the linea aspera is often separated 

 from the rest as the adductor minimus. The attachment of the muscle to the 

 epicondylic ridge is interrupted for the passage of the femoral vessels into the 

 popliteal fossa. The attachment to the medial condyle is by means of a strong 

 tendon which receives the fibres arising from the ischium (the part of the muscle 

 associated with the hamstring group). This tendon is closely connected with the 

 tibial collateral ligament of the knee-joint. 



The muscle is covered, anteriorly, by the other adductors and by the sartorius 

 muscle. The profunda femoris artery separates it from the adductor longus muscle, 



Obturator nerve 



Pubis 



PSOAS MAJOR 



Branch to hip-joint 



Deep branch 



Superficial branch 



Descending muscular branches 



PECTINEUS 



Ascending branch to obturator 

 extern us 



Medial circumflex artery 



ADDUCTOR LONGUS 

 ADDUCTOR BREVIS 



Cutaneous brand 



PlRIFORMIS 



GLUT^EUS MAXIMUS 



Pelvic fascia 

 OBTURATOR INTERNUS 



OBTURATOR EXTERNUS 

 Ischium 



Deep branch of medial circum- 

 flex artery of femur 



QUADRATUS FEMORIS 



Superficial branch of medial 

 circumflex artery 



Descending muscular branches 

 ADDUCTOR MAGNUS 



Branch to knee-joint 



Branch to femoral artery GRACILIS 



FIG. 367. SCHEME OP THE COURSE AND DISTRIBUTION OF THE RIGHT OBTURATOR NERVE. 



while the femoral artery is in contact with the muscle as it pursues its course 

 through the adductor canal. The posterior surface of the muscle is in relation 

 with the hamstring muscles. 



Nerve-Supply. The adductor magmis is a double muscle, and has a double nerve-supply. 

 The medial part of the muscle extending between the tuber ischiadicum and the medial condyle 

 of the femur, associated with the hamstring group of muscles, derives its nerve from the nerve 

 to the hamstring muscles, from the tibial nerve (L, 4. 5. S. 1.). This enters the muscle on its 

 posterior surface. 



The adductor portion of the muscle is supplied on its anterior surface by the deep branch of 

 the obturator nerve (L. 3. 4.). 



Actions. The adductor magnus is an adductor and extensor of the thigh. 



M. Obturator Externus. The obturator externus is placed deeply, under 

 cover of the previous muscles. It is a fan-shaped muscle lying horizontally in the 

 angle between the hip bone and the neck of the femur. 



It arises from the surfaces of the pubic bone and ischium, which form the 

 inferior half of the margin of the obturator foramen, and from the corresponding 



