162 MUSCLE TISSUE 



Sartorius ( Tailor Muscle) . Origin, anterior superior 

 spine of the ilium and small part of the notch imme- 

 diately below; insertion, inner surface of the tibia near 

 the tubercle, sending an expansion from the upper 

 border to the capsule, one from the lower border to 

 the fascia of the leg, and one to the tibia behind the 

 tendons of the gracilis and semitendinosus. 



Quadriceps Femoris. Largest muscle of the body, 

 four parts closely united, (a) Rectus femoris, in a 

 straight line from the pelvis to the patella. Origin, 

 by two heads, anterior one from the anterior inferior 

 spine, and posterior from the impression just above 

 the acetabulum; they join at an angle of 60 degrees 

 close below the acetabulum; the tendon is anterior 

 above, then in centre of the muscle. The lower tendon 

 becomes free three inches above the patella ; is attached 

 to the upper margin of that bone, and helps form the 

 common tendons. 



(6) The vastus externus is the outer part of the quad- 

 riceps. Origin, narrow and aponeurotic from the upper 

 half of the anterior intertrochanteric line, outer part 

 of the root of the great trochanter, outer side of the 

 gluteal ridge, upper half of the outer lip of the linea 

 aspera, from external intermuscular septum, and a 

 strong aponeurosis extending over the upper tw T o- 

 thirds of the muscle. Aponeurosis of insertion occupies 

 the deep surface of the muscle, joins the common 

 tendon, and sends expansion to the lateral patellar 

 ligaments and rectus tendon. 



(c) The vastus internus arises from a superficial 

 aponeurosis and deeper fibers from the spiral line, 

 inner lip of the linea aspera, and from tendons of the 

 adductor longus and magnus; they end in a deep 

 aponeurosis which enters the common tendon. Its 

 muscular fibers pass lower than those of the externus, 

 and are inserted into the inner margin of the patella, 

 some into the rectus tendon. 



Crureus arises from upper two-thirds of the anterior 



