How carsickness works
In: Biology
Your inner ear, which controls your balance, is telling your brain that you’re moving. Your eyes don’t notice all the small bumps in the road and subtle swaying that your inner ear is picking up. And your brain is receiving both of these signals and doesn’t understand what’s going on, and this makes you nauseous.
The reason why that information mismatch makes you nauseous isn’t as clear, but it might have something to do with the body perceiving it as a hallucination or poisoning, and throwing up could clear that out of your system.
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