Vestibulocochlear Nerve

Question 1

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

Answer 1

Meziere’s disease

Question 2

Endolymphatic is high in ______.

Answer 2

potassium

Question 3

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

Answer 3

Air conduction

Question 4

Saccular macula responds to acceleration in the _____ plane.

Answer 4

Sagital

Question 5

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

Answer 5

Horizontal

Question 6

Function of inner hair cells

Answer 6

more enervated, conduct sound

Question 7

Outer hair cells

Answer 7

amplify vibrations of the basilar membrane

Question 8

Otoacoustic emissions reflex

Answer 8

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.

Question 9

Acoustic reflex

Answer 9

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.