QUADRICEPS EXTENSOR CRURIS. 



275 



backwards as they descend, are inserted in a similar manner into the tendon 

 below, the superior tendon being prolonged on the anterior, the inferior 

 tendon on the posterior surface of the muscle. The inferior tendon forms 

 a broad band inserted into the upper surface of the patella. 



Fig. 211. 



Fig. 211. DEEP MUSCLES OF THE RIGHT 

 THIGH IN FRONT. 



a, anterior superior, and b, anterior inferior 

 spinous process of the ilium ; c, outer and 

 upper part of the great trochanter ; d, sym- 

 physis pubis ; e, patella ; /, inner side of the 

 knee-joint and internal lateral ligament ; g, head 

 of the fibula and outer side of the knee-joint ; 

 1, front of the gluteus medius ; 2, front of the 

 gluteus minimus, separate in this case from 

 the medius ; 3, tendon of the rectus, dividing 

 above into its two portions, one proceeding 

 from the inferior spine of the ilium, the other 

 passing back over the upper border of the ace- 

 tabulum ; 4, on the lower part of the anterior 

 intertrochanteric line and at the lower end of 

 the ilio-femoral part of the capsular ligament, 

 points by a line to the cut tendon of insertion 

 of the ilio-psoas muscle ; 5, part of the 

 obturator externus and quadratus femoris ; 

 0, pectineus ; 7, part of the adductor brevis ; 

 8, adductor magnus ; 9, vastus internus ; 10, 

 crureus ; 11, vastus externus ; 12, tendon of 

 the rectus ; 13, lower part of the slip of the 

 fascia lata by which the tensor vaginas femoris 

 is inserted into the tibia and fibula. 



Superiorly this muscle is overlaid by the 

 tensor vaginae femoris, iliacus, and sartorius 

 muscles ; further down it is covered only by 

 fiscia. The acetabutar tendon lies beneath 

 the gluteus minimus. 



6. The vastus externus arises by an 

 extensive aponeurosis attached to the 

 base of the great trochanter in front, 

 and to a ridge on its outer s-l'Ie, 

 also to the line extending from that 

 process to the linea aspera, and to the 

 outer border of the linea aspera itself ; 

 the aponeurosis is prolonged on the 

 surface of the muscle and gives origin to 

 numerous muscular fibres : further it 

 arises along the line which passes from 

 the linea aspera to the external condyle 

 in its upper two-thirds, by means of 

 muscular fibres attached to the inter- 

 muscular septum lying between it and 

 the short head of the biceps. The supe- 

 rior fibres descend perpendicularly, the 

 lowest are nearly horizontal, and the 



muscle, forming an expanded sheet applied to the surface of the crureus, 

 is inserted by a broad flat tendon into the tendon of the rectus muscle, the 

 patella, and the fascia lata on the front and side of the knee-joint. 



T 2 



