Vestibular Apparatus and Equilibrium

Vestibular Apparatus and Equilibrium - Anatomy of the Ear...

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Anatomy of the Ear Vestibular Apparatus and Equilibrium * Vestibular apparatus maintains the body (mainly the head) at equilibrium (at balance) and stabilizing the eyes relative to the environment * Static equilibrium- maintenance of the position of the body (mainly the head) relative to the force of gravity * Dynamic equilibrium- maintenance of the position of the body (mainly the head) in response to sudden movements such as rotation, acceleration, and deceleration. * Consists of 2 parts: * Otolithic organs * Utricle and saccule- static equilibrium * Semicircular canals- dynamic equilibrium Vestibular apparatus * Bony labyrinth surrounds membranous labyrinth filled with endolymph (like ECF). * Between bony labyrinth and membrane of membranous labyrinth is perilymph (like CSF) Vestibular apparatus: Otolithic organs * Utricle and saccule * Saccule connected to utricle by duct. * Each sensory area consist of a macule that contains the sensory mechanisms Utricle * an irregular, oblong membranous sac located on the medial wall of the vestibule. * lies horizontally
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Vestibular Apparatus and Equilibrium - Anatomy of the Ear...

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