It stops you from falling as it perceives which way is up, and what direction you are turning or spinning. And as you move your head, your vestibule-ocular reflex allows your eyes to stare at a fixed point as you shake your head. Your gait stability keeps you steady while moving – walking, running, walking a tightrope – as your feel and sense the movement of your body. All this information is gathered and processed by the central vestibular system – the brainstem – and sent to the brain for interpretation.