AUD 6305: Efferents

Emissions generated when two tones of different frequencies (f1 and f2)

are introduced into the ear

• Spontaneous OAEs

• Distortion-product OAEs

• Transient-evoked OAEs

• Olivocochlear OAEs

The efferent pathway that descends

from the primary auditory cortex to the SOC

• Caudal

• Dorsal

• Rostral

• Ventral

The efferent pathway that descends

from the brainstem to the OHCs and AN

• Rostral

• Ventral

• Dorsal

• Caudal

The ____ efferent system modulates OHC activity,

whereas the ____ efferent system modulates auditory nerve activity.

• LOC, MOC

• caudal, rostral

• MOC, LOC

• rostral, caudal

Most fibers in the MOC travel in the ____ olivocochlear bundle,

whereas most fibers in the LOC travel in the ____ olivocochlear bundle.

• uncrossed, crossed

• medial, lateral

• lateral, medial

• crossed, uncrossed

MOC efferents release this neurotransmitter

• ACh

• GABA

• Glutamate

• CGRP

COCB stimulation results in ____ of the contralateral OHC active process

• depolarization

• inhibition

• excitation

• no effect

Which of the following occur(s) when the OHC active process is inhibited? Select all that apply.

• DPOAE response increases

• CAP amplitude increases

• DPOAE response decreases

• CAP amplitude decreases

LOC efferents release some excitatory and some inhibitory neurotransmitters.

• True

• False

Which of the following would result in the smallest CAP response

to a tone presented at 65-db SPL?

• Tone presented in quiet

• Tone presented with ipsilateral noise

• Tone presented with binaural noise