Neurologically, OBEs are a form of bodily illusion arising from a temporary dissociation of visual and proprioceptive representations--normally these are coordinated, so that one views the world, including one's body, from the perspective of one's own eyes, one's head. OBEs, as Henrik Ehrsson and his fellow researchers in Stockholm have elegantly shown, can be produced experimentally, by using simple equipment--video goggles, mannequins, rubber arms, and so on--to confuse one's visual input and one's proprioceptive input and create an uncanny sense of disembodiedness.