8. Vestibular - The Vestibular Labyrinth Interconnected...

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The Vestibular Labyrinth Interconnected chambers that uses sensory hair cells to transduce physical motion into neural impulses. Semicircular Canals rotational accelerations of the head Otolith Organs linear accelerations of the head and static head position relative to gravity Mirror image
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Receptive Tissue of the Vestibular Sacs: the Utricle and the Saccule
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The Otolith Organs: The Utricle and Saccule otoconia -crystals of calcium carbonate Displacement of hair bundles à receptor potential in hair cells head tilts, gravity causes membrane to shift relative to the sensory epithelium. -make the otolithic membrane heavier than surrounding structures and fluids -shearing motion between the otolithic membrane and the macula displaces the hair bundle
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Receptive Organ of the Semicircular Canals Ampulla house sensory epithelium that contains hair cells Hair bundles extend into the cupula
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The Semicircular Canals Sense head rotations and angular acceleration head turns in plane of one
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