I've always enjoyed a good whodunnit mystery.
I'm also interested in the origins of the term Vestibular Disfunction you mentioned above from the eye doctor.
In a house the vestibule is the doorway, the entrance. I guess in the house of your brain, the vestibules are primarily the eyes and the ears. So if the message your brain is getting from one vestibule doesn't line up with what it is getting from another vestibule, like the soundtrack of a movie being off from the picture, that could be very confusing to your brain. (In your case it is the picture and the motion sensor tracks being "off")
I'm also interested in the origins of the term Vestibular Disfunction you mentioned above from the eye doctor.
In a house the vestibule is the doorway, the entrance. I guess in the house of your brain, the vestibules are primarily the eyes and the ears. So if the message your brain is getting from one vestibule doesn't line up with what it is getting from another vestibule, like the soundtrack of a movie being off from the picture, that could be very confusing to your brain. (In your case it is the picture and the motion sensor tracks being "off")