424 



THE MUSCLES AND FASCIA. 



terminate in a rounded tendon which passes behind the internal condyle of the 

 femur, and, curving round the inner tuberosity of the tibia, becomes flattened, and 



is inserted into the upper part of the inner 

 surface of the shaft of the tibia, below the 

 tuberosity. A few of the fibres of the lower 

 part of the tendon are prolonged into the 

 deep fascia of the leg. The tendon of this 

 muscle is situated immediately above that 

 of the Semitendinosus, and its upper edge is 

 overlapped by the tendon of the Sartorius, 

 with which it is in part blended. As it 

 passes across the internal lateral ligament 

 of the knee-joint it is separated from it 

 by a synovial bursa common to it and the 

 Semitendinosus muscle. 



Relations. By its superficial surface, 

 with the fascia lata and the Sartorius be- 

 low : the internal saphenous vein crosses it 

 obliquely near its lower part, lying super- 

 ficial to the fascia lata ; the internal saph- 

 enous nerve emerges between its tendon and 

 that of the Sartorius ; by its deep surface, 

 with the Adductor brevis and the Adductor 

 magnus and the internal lateral ligament of 

 the knee-joint. 



The Pectineus (Fig. 253) is a flat, quad- 

 rangular muscle, situated at the anterior part 

 of the upper and inner aspect of the thigh. 

 It arises from the linea ilio-pectinea, and to 

 a slight extent from the surface of the bone 

 in front of it between the pectineal eminence 

 and spine of the os pubis, and from the 

 fascia covering the anterior surface of the 

 muscle ; the fibres pass downward, backward, 

 and outward, to be inserted into a rough line 

 leading from the lesser trochanter to the 

 linea aspera. 



Relations. By its anterior surface, with 

 the pubic portion of the fascia lata, which 

 separates it from the femoral vessels and 

 internal saphenous vein ; by its posterior 

 surface, with the capsular ligament of the 

 hip-joint, the Adductor brevis and Obturator 

 externus muscles, the obturator vessels and 

 nerve being interposed ; by its outer border, 

 with the Psoas, a cellular interval separating 

 them, through which pass the internal cir- 

 cumflex vessels ; by its inner border, with 

 the margin of the Adductor longus. 



The Adductor longus, the most super- 

 ficial of the three Adductors, is a flat trian- 

 gular muscle lying on the same plane as 

 the Pectineus. It arises, by a flat narrow 

 tendon, from the front of the os pubis, at 

 the angle of junction of the crest with the 

 symphysis ; and soon expands into a broad fleshy belly, which, passing doAvn- 

 ward, backward, and outward, is inserted, by an aponeurosis, into the linea 



FIG. 254. 

 region. 



Deep muscles of the internal femoral 



