What gives rise to the perception of motion?
D004777:Environment; D005121:Extremities; D005133:Eye Movements; D006257:Head; D006801:Humans; D007257:Information Theory; D008027:Light; D008124:Locomotion; D009039:Motion Perception; D009068:Movement; D012160:Retina / Q000502:physiology; D012677:Sensation