Vestibular Sense and Perspectival Experience—A Reply to Adrian Alsmith1 Is there a vestibular sense?2 A unique feature of the vestibular system: The representation of absolute self-motion and orientation3 Vestibular system and perspectival experience—Experimental suggestions3.1 Experiments I and II: Changing vestibular processes through change in perspective3.2 Experiment III: Egocentric perspective4 Conclusion