THE CLASSIFICATION OF JOINTS 



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axis, the' base of the cone corresponding to the lower 

 extremity of the limb and the apex to the articular 

 cavity. This kind of movement is best seen in the 

 shoulder- and hip-joints. 



FIG. 58 



Right knee-joint. Anterior view. (Gray.) 



Rotation. This is the movement of a bone upon an 

 axis, which is the axis of the pivot on which the bone 

 turns. This form is seen best in the rotation between 



