Why Do We Get Motion Sickness?

Quick Answer

The brain receives mismatched signals from the eyes, inner ear, and body sensors about movement, triggering nausea.

The Full Story

Motion sickness arises from a sensory conflict. When you read in a moving car, your inner ear detects acceleration and turns, but your eyes — focused on a stationary page — report no movement. The brain interprets this mismatch as a possible sign of neurotoxin ingestion (since many poisons cause sensory confusion) and triggers nausea as a protective vomiting reflex. Looking out of the window helps because it aligns visual input with vestibular signals, reducing the conflict.

Key Facts

1.About one-third of people are highly susceptible to motion sickness.

2.Women and children between ages 2 and 12 are statistically more prone to motion sickness.

3.Dogs, cats, horses, and even fish can also experience motion sickness.

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