HAMSTRING MUSCLES 



same time lifts it in such a way that when both legs are acted 

 upon together, they are flexed and crossed, hence the name, 

 signifying "tailor" muscle" 



Nerve. Femoral. 



The tensor fasciae latae. Is attached 

 to the anterior part of the crest of the 

 ilium between two layers of the fascia lata; 

 it makes tense the lateral portion of the 

 fascia which is connected with the tibia, 

 or the ilio-tibial band. (This is felt like 

 a strong cord above the lateral epicon- 

 dyle.) It also rotates the thigh inward 

 (Fig. 91). 



Nerve. Superior gluleal. 



MUSCLES or THE THIGH 



Posterior 



The muscles are three in num- 

 ber the biceps femoris, semitendi- 

 nosus, and semimembranosus (Fig. 



93)- 



The biceps femoris. Origin. 



head on trie Tuber of the is- 

 chium, short head on the linea as- 

 pera (lateral lip). Insertion. The 

 head of the fibula. 



The ^emitendinosus and the 

 semimembranosus also arise on 

 the tuber of the ischium, and are 

 inserted on the tibia, medial sur- 

 face and back of head. (Their 



names indicate their shape, one FIG. 92. MEDIAL ASPECT OF THE 

 i j. i if , i THIGH AND PELVIS. 



being tendinous m half its length, ,_ a> ^ 4 _ Iliacus> psoas _ ol , tura . 

 and the other aponeuro tic, or mem- tor, piriformis; 5, gluteus maximus; 

 branous" ") 6 ' Sartorius 5 7. gracilis; 8, semitendin- 



osus; 9, semimembranosus; 10, n, 

 Action. These three muscles I2 ' tendons of sartorius, gracilis, and 



semitendmosus; 14, tendon of semi- 

 act together to flex the knee. membranosus (Sappey.) 



Nerve to the three. Sciatic. 



Notes.^ They also assist the gluteus maximus to extend the 

 thigh, as in rising from a chair. The biceps tendon may be feK 



