Perhaps when you trigger it conchesly you triggering the same part of the brain where vertigo takes place
I have had the feeling of vertigo as a child and the feeling is similar just more intense
Vertigo, or dizziness, refers to the sensation of spinning (subjective vertigo) or the perception that surrounding objects are moving or spinning (objective vertigo). Some patients describe a feeling of being pulled toward the floor or toward one side of the room. Moving the head, changing position, and turning while lying down often worsen vertigo.
The VRI is similar to vertigo in that there is a perceived movement of one's self and surroundings, but it is not vertigo.
VRIs happen in an instant, there is no spinning, dizziness or feeling of movement. One doesn't feel being pulled to the floor or a side of the room.
The only time I think I experience vertigo is when I spin myself around in circles quickly many times and then stop. There is a perceived movement, even when stopped but this isn't how a VRI feels.
A VRI is experienced with an instant 90 or 180 degree flip, akin to seeing the Necker cube flip, and you end up facing an entirely new direction, at once.
Also, one can calmly decide to initiate a VRI, several times, back and forth and fully experience it, whereas vertigo seems like it is something that involves a "loss of control".
Edited by Hugh, 29 August 2007 - 12:34 PM.