174 SPECIAL ANATOMY. 



rinus" tendinosus). Or. : tuber ischii (united with biceps}. Ins. : 

 spina tibise (internal surface of superior extremity) and fasc. 

 cruris. Use : like the last muscle : in semiflexion it rotates the 

 thigh a little inwards. 



352. Semimembranosits. 



Pos. : before the last muscle, behind adduct. magn., gastrocnem. 

 intern., art. and ven. poplitsea. Along the outer border, art., ven. 

 poplitasa, nerv. ischiadicus; on the internal border, gracilis. 

 Or.: tuber ischii (the highest, external part, before biceps and 

 semitendinosus). Ins.: Condyl. intern, tibise. Use: like the 

 last muscle. 



Nerves : (first to third) ischiadicus. 



REMARK. Between semimembranosus (within) and biceps, fern, (without) a 

 longitudinal space exists along the whole posterior surface of the thigh, in 

 which the uniting tissue of the pelvis, by means of the incisura ischiad. major '., 

 communicates with that of the popliteal region. 



b. Upon the outer surface. 



353. 4. Tensor fasciae latse (Fascialis). 



Pos. : in the upper third ; inside the thick envelope of the 

 thigh, on the outer border of Sartorius and rect. femor. ; covers 

 glut, med., minim. , and vastus extern. Or.: Spina ilei anter. 

 super, as far downwards as spina ilei infer. Ins. : fascia lata 

 femor. This is attached to the condyl. extern, and Spina tibiae. 

 Use : maintains vastus ext. in its situation ; rotates inwards, and 

 abducts the thigh. 



[Nerve: Glutcsus superior.'] 



c. On the anterior surface. 



354. 5. Sartorius (s. longus, because the longest muscle in 



the body). 



Pos. : the longest muscle, Sigmoidal, from the outer side of the 

 thigh to the inner of the knee, under the skin ; forms at the supe- 

 rior third of the thigh with pectinseus an isosceles triangle (base, 

 above), in the centre of which lies Jlrt. cruralis. In the second 

 third Jirt. cruralis at first passes on the internal edge, then on 

 the posterior surface, and lastly on the external edge. In the- 

 last third it lies between gracilis and vastus internus ; under the 

 anterior edge the n. saphenus passes forth, on the posterior Ven. 

 saphena (near the knee-joint). Above between tensor fascist and 

 iliacus, then upon rect. femor., adduct. long., vast, intern, and 

 gracilis. Or.: Spina ilei anter. super, (and rather below this). 

 Ins. : Crista tibise labium internum (below lig. patellse, before 

 tendd. mm. semitendin. and gracilis). Use : flexes at the same 



