Mechanisms of Equilibrium

Mechanisms of Equilibrium - mass called a cupula rotational...

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Mechanisms of Equilibrium & Orientation: - static equilibrium: maculae in the vestibule are sensory receptors for static equilibrium maculae respond to maculae are composed of receptor cells called hair cells that sense inertial movements (gliding due to movement) in an overlying otolithic membrane nerve - dynamic equilibrium: the crista ampullaris in the ampullae of the semicircular canals is the receptor for dynamic equilibrium hair cells (receptor cells) with each crista have cilia that project into a gel-like
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Unformatted text preview: mass called a cupula rotational movement of the head causes endolymph movement in the semicircular ducts that bends the cilia of hair cells of the crista bending of hair cell cilia results in depolarization & stimulation of the vestibular nerve- path to brain: although not fully worked out, it appears that fibers from the vestibular nerve travel to either the vestibular nuclei in the brain stem or the cerebellum since balance response needs to be fast/reflexive, input is to the reflex centers of brain stem rather than cerebral cortex as with other senses page7...
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