THE CLASSIFICATION OF JOINTS 



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cartilage, and held together by ligaments with a lining 

 synovial membrane. 



The Kinds of Movement Admitted in Joints. 

 These are divided into gliding, angular, circumduction, 

 and rotation. They are often combined, and it is sel- 

 dom that one distinct kind of motion is seen in any 

 certain joint. 



FIG. 54 



Temporomandibular articulation. Internal view. (Gray.) 



Gliding Movement. This is common to all movable 

 joints, but in the articulations of the wrist and foot 

 it is the only motion permitted. It consists of one 

 surface of a bone gliding over an adjacent bone without 

 any angular or rotatory movement. The sliding of a 

 bone over a wide range of surface, as is seen in the 

 patella (knee-cap) over the condyles of the femur, is 

 called coaptation. 



