OF THE DIFFERENT MUSCLES. 



157 



it sends off a thin expansion of tendon, by which it is in- 

 serted. 



Insertion. — Into the tendons of those muscles that are 

 fixed to the patella. It is also connected to the trochanter 

 minor externus, and fascia lata. 



Use. — To assist in drawing the haunch forwards and 

 upwards, and extend the thigh. 



Origin. — In part concealed by the iliacus, by two broad, 

 flat tendons, from the dorsum of the ileum, anteriorly to and 

 above the acetabulum. 



Insertion. — Into the upper and anterior, parts of the 

 patella. 



VASTUS EXTERNUS 



Runs along the outward side of the rectus. 



Origin. — From the inferior part of the root of the tro- 

 chanter major and minor, and outward surface of the os 

 femoris. 



Insertion. — With the rectus, into the upper and outer part 

 of the patella. 



VASTUS INTERNUS. 



Origin. — From the inward part of the neck of the os 

 femoris and root of the trochanter minor internus, and from 

 the inward part of the body of the bone. 



Insertion. — Into the patella. 



INTERNAL FEMORAL REGION. 

 SARTORIUS 



Is a long, thin muscle, crossing obliquely over the inward 

 side of the haunch, immediately under the fascia lata. 



Origin. — From the brim of the pelvis. In its course it 

 passes over part of the psoas magnus, and obliquely crosses 

 the vastus internus ; at the inward part of the stifle it ter- 



