I lO 



THE P^iI^XIPLES OF MVODYXAMICS. 



THE LEG AND THE KNEE-JOINT. 



103. In regard to the knee-joint, note the 

 folloAving points : 



( iJ The articular surface of the tibia for the 

 internal condyle of the femur is concave and 

 fitted for rotation. 



(2. ) The articular surface of the tibia for the 

 external condyle of the femur is convex from 

 before backward and concave from side to side, 

 and fitted for a gliding motion. 



(3.! The internal condyle is larger and pro- 

 jects downward further than the external con- 

 dyle. Hence, the femur meets the tibia so as 

 to make an obtuse angle on the outside of the 

 limb. 



(4.) The oblique fasciculus of the posterior 

 ligament of the knee-joint runs from the pos- 

 terior part of the external cond}"le inward and 

 downward to the inner aspect of the tibia — aiid 

 limits the out-rotatio7i of the leg. 



(5.) The anterior crucial ligament runs from 



