Originally posted by no2apprentice
Just a side note on the turning your head comment.
To understand what one is up against in M:S, one needs to understand the mechanism that causes motion sickness. It is called "sensory conflict." Our brains rely on input from key sensory inputs to tell us if we are moving, and/or if the enviroment is moving around us. Two key inputs are vision, and the inner ear. In the inner ear, there is fluid that passes over tiny little "hairs" that register movement to the brain. The brain also relies on input signals from the neck, muscles, and joints to indicate movement of our bodies or a shift of balance.
Example: you're riding in the back of car, reading a book. Because you are holding the book, the book moves as your body moves. Your eyes signal the brain there is minimum movement. But your inner ear, and other inputs, tell your brain there is movement. Sensory conflict starts, otherwise known as car sickness. Same situation occurs with air sickness, sea sickness, and now...M:S sickness.
Some people are very sensitive to sensory conflict, some have a strong resistence to it. I've seen footage on TV where the military does testing on sensory conflict, trying to understand the mechanism better. The person sits in a chair in a chamber. The chair is slightly off center in the room. The chamber spins. The subject does okay until he's told to turn his head. WHAM-O! Severe dizziness and nausea.
For those of you who knew about this topic, please excuse the rambling. Maybe this will help some people decide whether or not they should ride M:S.