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12 Cards in this Set
- Front
- Back
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vertigo is caused by problem in ___
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vestibular system
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vestibular system is made from ___ (2)
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semicircular canals
otolith organs |
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the 2 otolith organs are
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utricle
saccule |
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vestibular inputs go via ___ nerve to ___
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vestibulocochlear
vestibular nucleus |
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vestibular nucleus sends info to ___ (4)
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nucleus for contralateral abducens nerve
antigravity muscles cerebellum temporal lobe |
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vestibular antigravity muscle innervation is via
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vestibular spinal tract
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BPPV is ___. it is dxed by observing ___ during the ___ maneuver. it is caused by ___
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benign paroxysmal positional vertigo
nystagmus Dix-Hallpike dislocation of otoliths into semicircular canals |
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___ causes hours-long vertigo. it is caused by ___. it also causes ___ (2).
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meniere disease
high endolymph pressure low-frequency hearing deficit tinnitus |
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___ has an acute and often postinfectious onset. it presents with ___ vertigo, and ___ (2)
tx is ___ |
vestibular neuronitis
chronic nausea diarrhea symptomatic |
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normally, turning head to left causes increased/decreased vestibular input in left vestibular nerve and increased/decreased input in right. reflexively, the eyes go to left/right.
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increased
decreased right |
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reflex causes eye deflection to side with relatively higher/lower vestibular firing rate
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lower
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in nystagmus there is deflection of eyes ipsi/contralateral to the side where the firing rate dropped
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ipsilateral
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