Vestibulocochlear Nerve Flashcards

1
Q

_______ disease can be caused by endolymphatic obstruction. Can cause ballooning of the membranous labyrinth.

A

Meziere’s disease

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2
Q

Endolymphatic is high in ______.

A

potassium

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3
Q

When you get an infection in the air space by the bones you get _______conduction problems.

A

Air conduction

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4
Q

Saccular macula responds to acceleration in the _____ plane.

A

Sagital

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5
Q

Ultricular macule (utricle) responds to acceleration in the _______ plane.

A

Horizontal

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6
Q

Function of inner hair cells

A

more enervated, conduct sound

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7
Q

Outer hair cells

A

amplify vibrations of the basilar membrane

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8
Q

Otoacoustic emissions reflex

A

Control of outer hair cells involves superior olivary neurons that project through CN VIII directly to the cell bodies of outer hair cells. This is an inhibitory activity resulting in the decrease in the contractility of the outer hair cells especially during high frequency noise.

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9
Q

Acoustic reflex

A

mediated by the stapedius. CN VIII in, CN VII out, goes through superior olivary nucleus. Stapedial contraction is best for decreasing low frequency noises and may help filter out low frequency background noises.

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