Muscles of the Leg. 



337 



M. ghitaciis nicdius with its covering ot fascia 



Crista iliaca 



J[. glutaeus niaxiinus 



Sulcus fflutae 



M. seraitendi 



iSpina iliaca 

 anterior superior 



M. sartoriiis 



. tensor fasciae latae 



Insertion of the 

 m. glutaeus maximus 

 o the tractus iliotibialis 



Cut surface of the 



superficial layer of the 



tractus iliotibialis 



M. rectus femoris 



Insertion of the 



m. glutaeus maxinuis 



to the femur 



M. vastus lateralis 



M. biceps femoris . 



I Tractus iliotibialis [Maissiati] 



382. External muscles of the right hip, 



viewed from the lateral surface. 



(In order to show the varying mode of attachment of the m. ghitaeiis maximus, a piece has been cut 

 out of the superficial layer of the tractus iliotibialis and the deeper layer has been disected out.) 



M. tensor fasciae latae (0. T. tensor vaginae femoris) (see also Figs. 376 and 381). 

 Form: flat, oblong-quadrangular, thick. Position: on the lateral surface of the hip, just 

 beneath the skin; bounded in front by the mm. sartorius and rectus femoris, medianward and 

 behind by the m. glutaeus medius. Origin: tendinous from the spina iliaca anterior superior 

 and from the fascia lata. Insertion: the fibers riui parallel downward and go over, at the 

 junction of the upper with the middle third of the thigh, into the tractus iliotibialis [Maissiati] 

 (iliotibial band). Tbe muscle is covered on its lateral surface by a thin fascia, on its medial 

 surface by a thicker layer of fascia : these can be looked upon as a superficial and a deep layer 

 of the fascia lata. Action: it makes the fascia lata tense, especially the tractus iliotibialis; 

 it flexes the thigh and rotates it somewhat inward. Innervation: n. glutaeus superior. 



M. g-lutaeus maximus (see also Figs. 329, 381, 384, 385 aud 387). Form: flat, 

 quadrangular, very thick. Position: just beneath the skin of the buttock, the fleshy basis 

 of which it forms. Origin: lateral surface of the ala oss. ilium behind the linea glutaea 

 posterior, the posterior surface of the sacrum and coccyx and their ligaments, the ligg. sacro- 

 iliaca posteriora and the lig. sacrotuberosum. Insertion: the fibers run, nearly parallel, lateral- 

 ward and dowTiward : those of the upper jiortion go, in the form nf a broad tendon, over the lateral 

 surface of the trochtmter major femoris fb. troclianlerica m. glutaci maximi see Figs. 385 387 

 and p. 343), curve downward and pass over into the deep layer of the tractus iliotibialis, hidden 

 by the superficial layers of the same; the fibers of the lower portion are attached by ;i thick, 

 flat tendon to the tuberositas glutaea femoris (biirsae glutaeofemorales see Figs. 386 and 387. 

 iind p. 343). Action: it extends the thigh backward and rotates it somewhat outward. 

 Innervation: n. glutaeus inferior. 



