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CNIM: BAEPs Questions and Correct
Answers
What are evoked potentials? Ans: An averaged neural response
evoked by a stimulus
What is the latency of ECochG? Ans: Short latency (0-2 msec)
What is the latency of BAEPs? Ans: Short latency (2-15 msec)
What are the major anatomical features of the ear? Ans: Auricle
(pinna)
External auditory meatus (auditory canal)
Tympanic membrane
Auditory ossicles (malleus, incus, and stapes)
Cochlea
What is the outer ear comprised of? Ans: The visible part of the
ear (pinna) and the ear canal (external auditory meatus)
What does the pinna do? Ans: It is cup-shaped, so it gathers
sound waves from the environment and directs them into the ear
canal
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, 2 | Page
What do sound waves do to the eardrum? Ans: Either push
against it or pull away from it, or alternate
What is the middle ear? Ans: An air-filled cavity that holds three
bones: the malleus (hammer), incus (anvil) and stapes (stirrup)
How are the middle ear bones separated from the outer ear? What
happens when it is struck by a sound wave? Ans: Via the
tympanic membrane (eardrum) which when struck by a sound
wave, vibrates
What is the middle ear connected to? How? What does that serve
to do? Ans: Connected to the back of the nose and part of the
throat by a narrow tube called the Eustachian tube. Serves to
equalize pressure and drain fluid
What does the inner ear contain? What is it called? Ans: Contains
a group of interconnected, fluid-filled chambers. The snail-shaped
chamber is the cochlea
Where are sound vibrations from the bones of the middle ear
transferred to? Ans: To the fluid-filled cochlea
What lines the cochlea? What do they serve to do? Ans: Tiny hair
cells; they convert the vibrations into electrical impulses that are
transmitted along the auditory nerve to the brain
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, 3 | Page
What is the bony labyrinth? Ans: Bony structure surrounding the
contents
What is the membranous labyrinth? Ans: 3 fluid filled canals:
Scala vestibuli, scala media, and scala tympani
What is the Scala media also called? Ans: Scala media also called
cochlear duct
What do the membranous labyrinths do? Ans: Separate the
different compartments within the cochlea
What is the cochlea also called? Ans: A labyrinth
What is the Scala media important for? What does it house? Ans:
Important duct for hearing
This is where the cochlear hair cells reside- what cause the
auditory nerve to fire action potentials
What is the basilar membrane? Ans: Floor of the scala media;
divides the Scala tympani within the cochlea
Where does sound conducted through the ossicles send vibrations
to? Ans: To the basilar membrane which activates sensory cells
© 2025 All rights reserved
CNIM: BAEPs Questions and Correct
Answers
What are evoked potentials? Ans: An averaged neural response
evoked by a stimulus
What is the latency of ECochG? Ans: Short latency (0-2 msec)
What is the latency of BAEPs? Ans: Short latency (2-15 msec)
What are the major anatomical features of the ear? Ans: Auricle
(pinna)
External auditory meatus (auditory canal)
Tympanic membrane
Auditory ossicles (malleus, incus, and stapes)
Cochlea
What is the outer ear comprised of? Ans: The visible part of the
ear (pinna) and the ear canal (external auditory meatus)
What does the pinna do? Ans: It is cup-shaped, so it gathers
sound waves from the environment and directs them into the ear
canal
© 2025 All rights reserved
, 2 | Page
What do sound waves do to the eardrum? Ans: Either push
against it or pull away from it, or alternate
What is the middle ear? Ans: An air-filled cavity that holds three
bones: the malleus (hammer), incus (anvil) and stapes (stirrup)
How are the middle ear bones separated from the outer ear? What
happens when it is struck by a sound wave? Ans: Via the
tympanic membrane (eardrum) which when struck by a sound
wave, vibrates
What is the middle ear connected to? How? What does that serve
to do? Ans: Connected to the back of the nose and part of the
throat by a narrow tube called the Eustachian tube. Serves to
equalize pressure and drain fluid
What does the inner ear contain? What is it called? Ans: Contains
a group of interconnected, fluid-filled chambers. The snail-shaped
chamber is the cochlea
Where are sound vibrations from the bones of the middle ear
transferred to? Ans: To the fluid-filled cochlea
What lines the cochlea? What do they serve to do? Ans: Tiny hair
cells; they convert the vibrations into electrical impulses that are
transmitted along the auditory nerve to the brain
© 2025 All rights reserved
, 3 | Page
What is the bony labyrinth? Ans: Bony structure surrounding the
contents
What is the membranous labyrinth? Ans: 3 fluid filled canals:
Scala vestibuli, scala media, and scala tympani
What is the Scala media also called? Ans: Scala media also called
cochlear duct
What do the membranous labyrinths do? Ans: Separate the
different compartments within the cochlea
What is the cochlea also called? Ans: A labyrinth
What is the Scala media important for? What does it house? Ans:
Important duct for hearing
This is where the cochlear hair cells reside- what cause the
auditory nerve to fire action potentials
What is the basilar membrane? Ans: Floor of the scala media;
divides the Scala tympani within the cochlea
Where does sound conducted through the ossicles send vibrations
to? Ans: To the basilar membrane which activates sensory cells
© 2025 All rights reserved
