NBC-HIS Study Guide, NBC-HIS
Sample Board questions With
Correctly Detailed And Verified
Answers Graded A+!!!
A/C
Refers to a process by which sound is conducted through the outer
and middle ear
B/C
Refers to the evaluation of the inner ear function exclusive of the
outer or middle ear involvement
ABR
auditory brainstem response
Transfer function or areal ratio
22:1 an increase of 27dB
Acoustic reflex
Involuntary response, contraction of stapes, damper on system
stapedius and tensor tympani
Keeps ossicles Chain taught, responds to vibrations from TM,
protects cochlea from dangerously loud sounds, acoustic reflex
Terms associated with Scalia media
,Cochlear duct
Canal of the cochlea
Membranous labyrinth
Contains organ of Corti
What frequencies does the base of the cochlea contain
Highs
What frequencies does the apex contain
Lows
place theory of hearing
different areas of the basilar membrane respond to different
frequencies; neurons fire at a rate identical to stimulus below 1kHz
Volley theory of pitch perception
Stimulus beyond 1KHz is volleyed
Outer Ear Components
Helix
Anti Helix
scaphoid fossa
triangular fossa
external auditory meatus
tragus
anti tragus
lobule
concha
tympanic membrane
osseous portion
cartilaginous portion
inter-tragal notch
What does the outer ear do
funnels sound toward the inner ear
External Auditory Meatus
Self cleaning, 5cm long portion of the outer ear
,Vagus Nerve
Tenth cranial nerve
Tympanic Membrane
Comprised of 4 layers and creates an air tight/water tight seal to the
middle ear cavity
TM layers
comprised of 4 layers
Annular Ring
Holds TM in place
Pars Tensa
thick, taut, central-inferior section of tympanic membrane
Pars flaccida
small, slack, superior section of tympanic membrane
Quadrants of the Tm
anterior superior, anterior inferior, posterior superior, posterior
inferior
Middle ear components and use
conduct sound energy to the inner ear, holds the ossicular chain by
the tensor tympani and stapedius muscles
Incudostapedial junction
top of malleus articulates with top of incus, bottom of incus meets
stapes
Middle ear muscles and functions
Suspends the ossicular chain, acoustic reflex and protects cochlea
from dangerously loud sounds
Eustachian Tube
connects the middle ear with the nasopharynx and allows passage of
air
, mastoid process
round projection on the temporal bone behind the ear
Semicircular Canals
three fluid-filled canals in the inner ear responsible for our sense of
balance
Vestibule
endolymph filled cavity attached to the semicircular canals and the
cochlea that is responsible for gravity and acceleration
Cochlea
a coiled, bony, fluid-filled tube in the inner ear through which sound
waves trigger nerve impulses
Key areas of the cochlea
11 areas, membranes, windows, the scala's
Terms associated with scala media
cochlear duct, canal of the cochlea, membranous labyrinth
Organ of Corti
Center part of the cochlea, containing hair cells, canals, and
membranes
Tectorial membrane
A membrane located above the basilar membrane; serves as a shelf
against which the cilia of the auditory hair cells move
Auditory Nerve
VIII cranial nerve
Vestibular nerve
nerve that conducts impulses related to maintaining balance to the
brain
Auditory nerve
contains 30 000 neurons
Sample Board questions With
Correctly Detailed And Verified
Answers Graded A+!!!
A/C
Refers to a process by which sound is conducted through the outer
and middle ear
B/C
Refers to the evaluation of the inner ear function exclusive of the
outer or middle ear involvement
ABR
auditory brainstem response
Transfer function or areal ratio
22:1 an increase of 27dB
Acoustic reflex
Involuntary response, contraction of stapes, damper on system
stapedius and tensor tympani
Keeps ossicles Chain taught, responds to vibrations from TM,
protects cochlea from dangerously loud sounds, acoustic reflex
Terms associated with Scalia media
,Cochlear duct
Canal of the cochlea
Membranous labyrinth
Contains organ of Corti
What frequencies does the base of the cochlea contain
Highs
What frequencies does the apex contain
Lows
place theory of hearing
different areas of the basilar membrane respond to different
frequencies; neurons fire at a rate identical to stimulus below 1kHz
Volley theory of pitch perception
Stimulus beyond 1KHz is volleyed
Outer Ear Components
Helix
Anti Helix
scaphoid fossa
triangular fossa
external auditory meatus
tragus
anti tragus
lobule
concha
tympanic membrane
osseous portion
cartilaginous portion
inter-tragal notch
What does the outer ear do
funnels sound toward the inner ear
External Auditory Meatus
Self cleaning, 5cm long portion of the outer ear
,Vagus Nerve
Tenth cranial nerve
Tympanic Membrane
Comprised of 4 layers and creates an air tight/water tight seal to the
middle ear cavity
TM layers
comprised of 4 layers
Annular Ring
Holds TM in place
Pars Tensa
thick, taut, central-inferior section of tympanic membrane
Pars flaccida
small, slack, superior section of tympanic membrane
Quadrants of the Tm
anterior superior, anterior inferior, posterior superior, posterior
inferior
Middle ear components and use
conduct sound energy to the inner ear, holds the ossicular chain by
the tensor tympani and stapedius muscles
Incudostapedial junction
top of malleus articulates with top of incus, bottom of incus meets
stapes
Middle ear muscles and functions
Suspends the ossicular chain, acoustic reflex and protects cochlea
from dangerously loud sounds
Eustachian Tube
connects the middle ear with the nasopharynx and allows passage of
air
, mastoid process
round projection on the temporal bone behind the ear
Semicircular Canals
three fluid-filled canals in the inner ear responsible for our sense of
balance
Vestibule
endolymph filled cavity attached to the semicircular canals and the
cochlea that is responsible for gravity and acceleration
Cochlea
a coiled, bony, fluid-filled tube in the inner ear through which sound
waves trigger nerve impulses
Key areas of the cochlea
11 areas, membranes, windows, the scala's
Terms associated with scala media
cochlear duct, canal of the cochlea, membranous labyrinth
Organ of Corti
Center part of the cochlea, containing hair cells, canals, and
membranes
Tectorial membrane
A membrane located above the basilar membrane; serves as a shelf
against which the cilia of the auditory hair cells move
Auditory Nerve
VIII cranial nerve
Vestibular nerve
nerve that conducts impulses related to maintaining balance to the
brain
Auditory nerve
contains 30 000 neurons
