1) Voluntary movement 
• (n.) Spontaneous or voluntary movement; movement due to an internal cause.
(aw″to-kĭ-ne´sis) voluntary motion. adj., autokinet´ic., adj.
Au`to·ki·ne'sis noun [ New Latin ; auto- + Greek ... motion.] (Physiol.) Spontaneous or voluntary movement; movement due to an internal cause. 
autokinesis, autokinesia Voluntary activity or movement. Visual autokinesis refers to the illusion that an object in space, especially at night, moves as one continues to look at it. An aviator looking at a distant light may perceive that it has moved even though it is stationary.
voluntary movement.