Investigating the neuro-cognitive fundaments of the perception of illusory self-motion

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The perception of self-motion is guided by the integration of different sensory information, including visual, vestibular (inner-ears), and proprioceptive (position of the muscles and joints) cues. Information delivered by these senses is typically congruent, giving rise to a global, accurate perception of movement through space. However, under certain circumstances illusory self-motion or vection (i.e., self-motion perception despite the absence of real, physical movement) can also be experienced. An example for vection in real-world situation is the train illusion, whereby sitting in a stationary train and seeing a neighboring train moving creates the illusion that one’s own train is moving. Vection can also be observed in situations that stimulate a large proportion of the visual field, such as in simulators or virtual reality (VR) and plays an important role in these applications.