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Biology and Medical
Mechanics of Spinning Around (effects on inner ear)
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[QUOTE="sophiecentaur, post: 6831301, member: 199289"] Hang on. it is spinning around [I]some axis [/I]and the lazy Susan experiment is attempting to get down to the basics. If you put the water at the edge of the lazy Susan, you will still get the effect plus the centrifugal force (in the frame of the glass) which will also cause the water to 'lean' slightly because it is orbiting as well as spinning. Our sensory system has several shortcomings and they tend to be result of evolution and the fact that there are some sensations which we rarely experience - so why expend energy on infrequently used facilities? We are good at detecting changes accurately but we ignore long term sensations. We get used to static upwards forces from the floor (our weight force) but we notice subtle changes as we start to move up and down in a lift, for instance. In the case of spinning, we have both visual and balance clues. After spinning, the visual clues reset to zero but the balance sensors take some time to reset. So that leads to confusion and nausea etc.. I have experienced Vertigo a couple of times in my life (also been fairly drunk). The sensations from the balance mechanism tells one thing; it makes you think the room should be rotating. The sensation from the vision tells you the room is stationary and you try to chase it with your eyes (irrationally). We are always dealing with limited angles of rotation so we are good at sensing how much and how fast, up to one rotation, say. Dancers and skaters deal with the problem by 'spotting'. They fix their gaze on a stationary point so that, when they stop, there is less conflict between the two sensory inputs as their head 'thinks' it's been stationary for most of the time (both sensors). [/QUOTE]
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Mechanics of Spinning Around (effects on inner ear)
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