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| Rotational head movements cause the fluid in the cupula of the semicircular canal to "bend" the hair cells. The hair cells, in turn, send a signal to your brain that you are experiencing "motion".
Vertigo can occur when these hair cells are still sending signals of motion, even though you may be perfectly still, giving you the "illusion of movement".
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Review Date:
12/31/2023
Reviewed By:
Joseph V. Campellone, MD, Department of Neurology, Cooper Medical School at Rowan University, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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