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A 31-year-old member asked:

Why do i throw up when i get motion sickness?

3 doctor answers4 doctors weighed in
Dr. Dennis Diaz
ENT and Head and Neck Surgery 38 years experience
Vomit center: There are several neural connections present to help maintiain our balance. Unfortunately one of those balance connections goes through the "vomit center" in the brain stem. Motion sickness is due to sensory conflict (incongruous information from different sensory systems). When this sensory conflict occurs, it triggers an assortment of responses of which vomiting is one.
Dr. Matthew Goren
Ophthalmology 32 years experience
A=A: That's what motion sickness is. You get nauseous and often throw up.
Dr. Alan Ali
Dr. Alan Alianswered
Psychiatry 32 years experience
Motion sickness: One theory is that it is a defense mechanism against neurotoxins. When we feel motion but can't see it, the inner ear transmits to the brain that it senses motion, but the eyes tell the brain that everything is still. As a result the brain concludes that one of them is hallucinating & that the hallucination is due to poison ingestion. The brain responds by inducing vomiting to clear the toxin.

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A 25-year-old member asked:

Why do people with motion sickness throw up?

2 doctor answers2 doctors weighed in
Dr. Nalinaksha Joshi
Neurology 23 years experience
Autonomic n s: Vertigo is one of the many conditions that causes imbalance of autonomic nervous system function. As a result parasympathetic function through vagus nerve increases giving fist to contraction of stomach muscle and vomiting. Blood pressure, heart rate can change too.

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Last updated Apr 19, 2019

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