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A definition of the three types of movement that can be performed by the body. (Plane movement) The limb segment moves in a plane that is at 90 degrees to the axis of its movement. (Rotatory movement) The limb moves at an angle of zero degrees to its own axis: i.e., it does not move in space, but merely twists around the axis through its length. (Conical movement) The limb moves at an angle <90 degrees and >0 degrees to its axis of movement.
