Motion sickness causes: Difference between revisions
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The most common hypothesis for the cause of motion sickness is that it evolved as a defense mechanism against [[neurotoxin]]s.<ref name="GMO">[http://www.brooksidepress.org/Products/OperationalMedicine/DATA/operationalmed/Manuals/GMOManual/clinical/Motion%20sickness.html General Medical Officer (GMO) Manual: Clinical Section: Motion Sickness]</ref> The [[area postrema]] in the [[human brain|brain]] is responsible for inducing vomiting when poisons are detected, and for resolving conflicts between vision and balance. When feeling motion but not seeing it (for example, in a ship with no windows), the [[inner ear]] transmits to the brain that it senses motion, but the eyes tell the brain that everything is still. As a result of the disconcordance, the brain will come to the conclusion that one of them is [[hallucinating]] and further conclude that the hallucination is due to poison ingestion. The [[brain]] responds by inducing vomiting, to clear the supposed toxin. | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
Revision as of 15:51, 21 February 2013
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Vishnu Vardhan Serla M.B.B.S. [2]
Causes
The most common hypothesis for the cause of motion sickness is that it evolved as a defense mechanism against neurotoxins.[1] The area postrema in the brain is responsible for inducing vomiting when poisons are detected, and for resolving conflicts between vision and balance. When feeling motion but not seeing it (for example, in a ship with no windows), the inner ear transmits to the brain that it senses motion, but the eyes tell the brain that everything is still. As a result of the disconcordance, the brain will come to the conclusion that one of them is hallucinating and further conclude that the hallucination is due to poison ingestion. The brain responds by inducing vomiting, to clear the supposed toxin.