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Motion sickness is primarily caused by what?

Choices

  • ✓ Conflicting motion signals from the eyes and inner earcorrect

    The brain receives disagreeing motion cues, producing nausea.

  • Excess oxygen in the blood

    Motion sickness is not caused by excess oxygen.

  • Low cabin humidity alone

    Dry air contributes to dehydration, not motion sickness itself.

  • Carbon monoxide exposure

    CO causes hypemic hypoxia, a separate problem.

Why

Motion sickness results when the eyes and the inner ear send conflicting motion signals to the brain, producing nausea, sweating, and discomfort.

FAA source: PHAK Ch. 17 / motion sicknessbrowse the reference library →

This is taught in When Your Senses Lie: Disorientation, Motion Sickness, Ears and Night Vision — study the lessons free, then practice with grading and mastery tracking.

Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.

Motion sickness is primarily caused by what? · PPL Free Ground School