192 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. 
Jnsertion 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. 
90, /). 
Action. — Assists 
the iliopsoas. 
B. MUSCLES ON 
THE MEDIAL SurR- 
FACE OF THE Hip.— 
M. obturator internus 
(Fig. 90, ¢).—The obtura- 
tor internus appears as a tri- 
angular muscle caudad of the ge- 
mellus superior. 
Fic. 90.—MuscLES ON THE LATERAL SIDE OF THE 
LEG, AFTER REMOVAL OF THE MUSCLES SHOWN IN 
Fic. 68 (Biceps, TENSOR FASCI4 LATA, CaAuno- 
FEMORALIS, AND GLUTEUS MAXIMUS). 
a, M. sartorius; 4, M. gluteus medius; ¢, M. rectus 
femoris; @, M. vastus lateralis: e, M. obturator internus; 
J, M. quadratus femoris; g, M. tenuissimus; 4, M. ad- 
ductor femoris; z, M. semimembranosus; 7, M. semi- 
tendinosus; 4, M. vastus intermedius; 7, M. plantaris; 
m, m', m!', M. gastrocnemius, outer head (#, part from 
the external sesamoid bone; 72’, from the plantaris; m”, 
from the superficial fascia); 7, M. tibialis anterior; o, M. 
soleus; 2, M. extensor longus digitorum; g. M. peroneus 
longus; 7, M. peroneus tertius (7' its tendon); s, M. 
peroneus brevis; 7, tendon of Achilles; #, M. extensor 
brevis digitorum, 1, great trochanter of femur; 2, 
tuberosity of ischium, with cut origin of M. biceps 
oi femoris; 3, patella; 4, calcaneus; 5, transverse liga- 
Lip ments; 6, lateral malleolus. : 
