十万个为什么·科学启蒙30篇（4）

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为什么晕车与前庭有关

Your vestibular system—located in the inner ear—detects head movement, gravity, and acceleration using fluid-filled canals.
When you read in a moving car, your eyes see still pages while your inner ear senses motion, causing sensory conflict.
This mismatch confuses the brain and triggers nausea, sweating, and dizziness as a protective response.
Children aged 2–12 are especially vulnerable because their vestibular and visual systems are still maturing.
Looking out the window helps because it aligns visual input with motion signals from the inner ear.
Medications like dimenhydrinate block signals between the vestibular nerves and the vomiting center in the brain.
Ginger or acupressure wristbands may ease symptoms by influencing neural pathways related to nausea.
Regular exposure to motion—like short car rides—can gradually train the brain to resolve conflicting inputs.