Which system is primarily involved in seasickness?

Which system is primarily involved in seasickness?

• A. Nervous system.
• B. Vestibular (inner ear) system.
• C. Circulatory system.
• D. Immune system.

Answer: (B)

The vestibular system in the inner ear is responsible for sensing motion and balance. Seasickness happens when the signals from this system (your semicircular canals and otolith organs) indicating movement don’t line up with what your eyes are seeing. That sensory mismatch triggers the brain’s nausea and autonomic response, causing dizziness and vomiting. The nervous system processes all these signals, but the root cause is the vestibular input. Circulatory and immune systems aren’t the primary drivers here. Keeping a steady gaze on the horizon or a fixed point helps by providing a stable visual reference that reduces the conflict between what you feel and what you see.

The vestibular system in the inner ear is responsible for sensing motion and balance. Seasickness happens when the signals from this system (your semicircular canals and otolith organs) indicating movement don’t line up with what your eyes are seeing. That sensory mismatch triggers the brain’s nausea and autonomic response, causing dizziness and vomiting. The nervous system processes all these signals, but the root cause is the vestibular input. Circulatory and immune systems aren’t the primary drivers here. Keeping a steady gaze on the horizon or a fixed point helps by providing a stable visual reference that reduces the conflict between what you feel and what you see.