194 THE MUSCLES. 



Insertion by tendon and fleshy fibres into the apex of the 

 lesser trochanter of the femur. 



Relatiofis. — Dorsal surface with the quadratus lumborum 

 (with which this muscle is partly united), the rectus femoris 

 (Fig. 91, (i), and, by the iliac head, with the gluteus minimus. 

 Ventral and medial surface with the psoas minor (Fig. 162, 9) 

 and the peritoneum. Lateral edge with the transversus 

 abdominis (Fig. 162, 4). 



Action. — Rotates the thigh so as to carry the foot out; also 

 flexes the thigh. 



2 . Muscles of the Thigh. 



M. biceps femoris (Fig. 68, /, page 117). — A very large 

 flat muscle covering about two-thirds of the lateral side of the 

 thigh. 



Origin (Fig. 90, 2). — From the ventral surface of the 

 tuberosity of the ischium by tendon- and muscle-fibres. The 

 fibres diverge, and near the knee the mass has spread out, end- 

 incT in a fascia. The dorsal border of the muscle and the 

 common fascia are continuous dorsad with the superficial fascia 

 of the thigh and with the tendon of the caudofemoralis (Fig. 

 68, s). Ventrad it is continuous with the superficial fascia of 

 the shank. 



Insertion into rather more than the proximal one-third of 

 the dorsal border of the tibia along its lateral margin and into 

 the lateral margin of the patella. In passing over the knee- 

 joint it is closely united to the underlying ligaments and 

 tendons. 



Relations. — Outer surface with the superficial fascia and 

 with a few of the most caudal fibres of the cutaneus maximus 

 (Fig. 62, b, page 94). Cranial (or dorsal) edge with the 

 caudofemoralis (Fig. 68, s) ani the vastus lateralis (Fig. 90, a). 

 Caudal border with the semitendinosus (Fig. 6^, 11) and a mass 

 of fat. Inner surface with the caudofemoralis (Fig. 68, s), the 

 tenuissimus (Fig. 90, g), the obturator internus (Fig. 90, e) 

 the quadratus femoris (Fig. 90, /), the semitendinosus (Fi 

 68, «), the semimembranosus (Fig. 90, i), the adductor fem 

 (Fig. 90, //), the great sciatic nerv^ (Fig- 163, a), and d' 



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