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neuro ch 9
terms
10
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Not Applicable
12/15/2005

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Term
vestibular labyrinth
Definition
where the vestibular organs are. circular canals, ampullae, utricle, saccule, scarpa's ganglion
Term
macula/maculae
Definition
receptor organs of the utricle and saccule
Term
otolithic membrane
Definition
hair cells of the macula have their ends in this gelitinous mass with calcium carbonate granules called otoliths
Term
crista ampullaris
Definition
contain the hair cells inside the circular canals that move when the endolymph moves
Term
utriculopetal flow
Definition
toward the utricle
Term
utriculofugual
Definition
away from the utricle
Term
where do the vestibular nuclei project to?
Definition
cerebellum, reticular formation, spinal cord
Term
Vestibulo-ocular reflex (VOR)
Definition
eyes move slowly in one direction and then jerk back in the other direction (vestibular nystagmus)...pathway is medial longitudinal fasciculus - links vestibular nuclei to cranial nerves III, IV, VI
Term
vertigo
Definition
dysfunction of the vestibular system leading to a feeling of falling
Term
kinocillium
Definition
hair cells are depolarized when they bend towards this, taller than the rest of the stereocilia
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