lecture12-13

lecture12-13 - THE EAR EQUILIBRIUM State of balance of the...

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THE EAR: EQUILIBRIUM State of balance of the body Role in body positioning: - information from inner ear - proprioceptors - vision
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THE EAR: EQUILIBRIUM hair cells - lining the fluid filled - vestibular apparatus - semicircular canals - Otolith organs Utricle and Saccule respond to changes in: - rotational, vertical and linear acceleration similar to hair cells of cochlea - but gravity and acceleration and not sound waves
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The vestibular apparatus: filled with endolymph 2 saclike otolith organs: - utricle and saccule three semicircular canals ampulla - crista - gelatinous cupula - vestibular nerve sensory receptor of otolith organs: - maculae- contains - gelatinous mass- otolith membrane - otoliths
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Vestibular apparatus - information about equilibrium: special sense of equilibrium: 1. Dynamic - movement through space 2. Static - head displacement semicircular canals - rotational acceleration otolith organs - linear acceleration and head position hair cells have one long cilium called - kinocilium
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project primarily to the cerebellum descending pathways from vestibular nuclei - motor neurons of eye movement
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lecture12-13 - THE EAR EQUILIBRIUM State of balance of the...

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