Virtual reality and the vestibular apparatus

The sensation of presence is the defining feature of a virtual reality (VR) system. In this sense, the VR system is required to create stillness in the presence of motion. Because the subject interacts with the VR system, an understanding of how the nervous system deals with motion will help in understanding how to build better VR systems and understand how these motion and stillness illusions affect the user. The two main sensory systems that perceive motion are the visual and the vestibular.