THE MUSCLES. 



outer surface of the ramus of the ischium as far as the area for 

 the quadratus femoris (Fig. 90, /). 

 The fibres converge to a strong flat 

 tendon. 



Insertion into the proximal por- 

 tion of the bottom of the tro- 

 chanteric fossa. 



Relations . Ventral sur- 

 face with the adductor fem- 

 oris (Fig. 92, g). Dorsal 

 surface with the pubis 

 and ischium. Caudal 

 border with the quad- 

 ratus femoris (Fig. 



''/fj'ffl Action. Assists 



-** the iliopsoas. 



B. MUSCLES ON 

 / THE MEDIAL SUR- 

 FACE OF THE HIP. 

 M. obturator internus 

 (Fig. 90, e). The obtura- 

 tor internus appears as a tri- 

 angular muscle caudad of the ge- 

 mellus superior. 



FIG. 90. MUSCLES ON THE LATERAL SIDE OF THE 

 LEG, AFTER REMOVAL OF THE MUSCLES SHOWN IN 

 FIG. 68 (BICEPS, TENSOR FASCIA LATM, CAUDO- 

 FEMORALIS, AND GLUTEUS MAXIMUS). 

 , M. sartorius; b, M. gluteus medius; c, M. rectus 

 femoris; d, M. vastus lateralis; e. M. obturator internus; 

 f, M. quadratus femoris; g, M. tenuissimus; h. M. ad- 

 ductor femoris; z, M. semimembranosus ; /, M. semi- 

 tendinosus; k, M. vastus intermedius; /, M. plantaris; 

 m, m', m", M. gastrocnemius, outer head (m, part from 

 the external sesamoid bone; m', from the plantaris; m", 

 from the superficial fascia); , M. tibialis anterior; 0, M. 

 soleus; /, M. extensor longus digitorum; q> M. peroneus 

 longus; r, M. peroneus tertius (r' its tendon); s, M. 

 peroneus brevis; f, tendon of Achilles; u, M. extensor 

 brevis digitorum. I, great trochanter of femur; 2, 

 tuberosity of ischium, with cut origin of M. biceps 

 femoris; 3, patella; 4, calcaneus; 5, transverse liga- 

 ments; 6, lateral malleolus. 



