Describe what is happening in the inner ear when someone experiences motion sickness.What nerve is involved?

Instructions: This is an essay. Answers should be given in complete sentences that are grammatically correct and checked for spelling. Grammar and spelling will count toward the grade. Answers should be well thought-out and demonstrate understanding of the concept. Poorly written and sloppy essays will result in a deduction of points.
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Topic: Choose one of the topics below and write an essay. Or you can choose a topic that interests you. Please make sure it is A&P and/or medically related. If you are unsure if a particular topic is appropriate, just ask me.
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Describe what is happening in the inner ear when someone experiences motion sickness.What nerve is involved?