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.

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vestibular apparatus n vestibular system

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the structures in the internal ear concerned with reception and transduction of stimuli of equilibrium; they include the semicircular canals, the utricle, and the saccule.

Medical dictionary. 2011.

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