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Definition of Vestibular apparatus

Vestibular apparatus: The vestibule and three semicircular canals of the inner ear. Like an internal carpenter's level, these structures work with the brain to sense, maintain, and regain balance and a sense of where the body and its parts are positioned in space.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=6131
Last Editorial Review: 8/28/2013

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