types: plane (nonaxial movement, gliding, intercarpal joints) hinge (uniaxial, flexion & extension, elbow joints) pivot (uniaxial, rotation, proximal radioulnar) Condylar( biaxial, flexion, extension, abduction, adduction) saddle ( biaxial, adduction, abduction, flexion, extension, joints of the thumb) Ball and socket ( mulitaxial, flexion, extension, abduction, adduction, rotation, shoulder and hip joints)