11 -- Vestibular Function

11 -- Vestibular Function - Vestibular Function Overview of...

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Vestibular Function
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Overview of Structures Anatomy of the Ear
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Overview of Structures Vestibule continuous with cochlea Contains 2 fluid-filled spaces ( UTRICLE and SACCULE ) These spaces have specialized receptors for sensing head tilt and linear acceleration Semicircular Canals Tubes that branch off of vestibule Have specialized receptors for sensing rotational acceleration
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Utricle and Saccule Each contains a receptor organ similar to organ of corti Called MACULA – Has hair cells w/ stereocilia – Stereocilia extend into gelatinous otolithic membrane Has crystalline stones called OTOLITHS Give membrane weight Maculae (plural) are specialized for detecting linear accel., static head position relative to gravity, and head tilt MACULA MACULA
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Utricle and Saccule When head tilts (or accelerates in a straight line), inertia acts on otoliths and movement of otolithic membrane occurs bends stereocilia
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Macula Hair Cells
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11 -- Vestibular Function - Vestibular Function Overview of...

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