ACNS Guidelines - BSERs
What are the two categories of events in short--latency auditory evoked potentials
(SAEPs)? - answer electrocochleogram (ECochG)
brainstem auditory evoked potentials
ECochG consists of electrical responses of the __________ and ____________ to
acoustic stimulation. - answer cochlea
auditory nerve
What are the (3) components of the ECochG? - answer cochlear microphonics
summating potential
auditory nerve compound action potential (AP)
Cochlear microphonics and the summating potential are receptor potentials of
_______________. - answer cochlear hair cells
The auditory nerve compound AP is the whole-nerve AP generated by
_________________. - answer primary auditory nerve fibers
The detection of ECochG requires special techniques such as recordings from the
_____________. - answer External auditory meatus.
What type of clicks should be used for SAEPs? - answerbroad-band
The clicks should be generated by driving with a ______ usec ______________ pulse,
a standard audiometric earspeaker having a relatively _____ frequency spectrum. -
answer100
rectangular (single monophasic square wave)
flat
The waveform of the driving pulse is referred to as the click's _____________. -
answerelectrical waveform
The sound pressure waves are referred to as the click's _______________. -
answeracoustical waveform
The acoustic wave-form resembles the stimulus applied to the __________________. -
answertympanic membrane
Why are other stimuli for BAEPs (tone bursts, tone pips, filtered clicks, single-cycle
clicks, etc.) not recommended for intraoperative applications? - answerTheir frequency
spectra is more restricted than those of broad-band clicks.
, Those clicks in which the first and major acoustic wave applies negative pressure in
front of the earspeaker diaphragm are referred to as ____________ clicks. -
answerrarefaction
Those clicks in which the first and most prominent acoustic wave applies a positive
pressure in front of the earspeaker diaphragm are referred to as ___________ clicks. -
answercondensation
True or false: acoustical polarity is never reversed during transfer of the ear canal. -
answerFalse
it sometimes is
In certain conditions associated with severe, steep high-frequency hearing loss, BAEPs
elicited by rarefaction clicks may differ in ________, and to a degree in ________, from
BAEPs evoked by condensation clicks. - answerlatency
morphology
If no differences exist between differences between separate rarefaction and
condensation stimuli, why may it be beneficial to summate responses elicited by
separate rarefaction and condensation clicks? - answerit reduces artifact
Should increased latency differences between rarefaction and condensation stimuli be
interpreted as evidence of retrocochlear dysfunction? - answerNo
What are the stimulus rates employed for BAEPs?
At what rate are waves I, III, VI, and VII reduced in amplitude?
What stimulus rates are especially suited to resolve those peaks? - answer5-200/s
> 10/s
8-10/s
It is recommended that click intensity be acoustically calibrated in _____________. -
answerdecibels peak-equivalent sound pressure level
dB pe SPL
What are (2) examples of sound intensity measures that each laboratory should be
capable of converting its intensity measures to? - answerdB HL (decibels above normal
hearing level)
dB SL (decibels above sensation level)
At what intensity should the contralateral ear be masked by white noise? - answer60 dB
SPL
Why is the contralateral ear masked by white noise? - answerTo eliminate "crossover"
(bone-conducted) responses.
What are the two categories of events in short--latency auditory evoked potentials
(SAEPs)? - answer electrocochleogram (ECochG)
brainstem auditory evoked potentials
ECochG consists of electrical responses of the __________ and ____________ to
acoustic stimulation. - answer cochlea
auditory nerve
What are the (3) components of the ECochG? - answer cochlear microphonics
summating potential
auditory nerve compound action potential (AP)
Cochlear microphonics and the summating potential are receptor potentials of
_______________. - answer cochlear hair cells
The auditory nerve compound AP is the whole-nerve AP generated by
_________________. - answer primary auditory nerve fibers
The detection of ECochG requires special techniques such as recordings from the
_____________. - answer External auditory meatus.
What type of clicks should be used for SAEPs? - answerbroad-band
The clicks should be generated by driving with a ______ usec ______________ pulse,
a standard audiometric earspeaker having a relatively _____ frequency spectrum. -
answer100
rectangular (single monophasic square wave)
flat
The waveform of the driving pulse is referred to as the click's _____________. -
answerelectrical waveform
The sound pressure waves are referred to as the click's _______________. -
answeracoustical waveform
The acoustic wave-form resembles the stimulus applied to the __________________. -
answertympanic membrane
Why are other stimuli for BAEPs (tone bursts, tone pips, filtered clicks, single-cycle
clicks, etc.) not recommended for intraoperative applications? - answerTheir frequency
spectra is more restricted than those of broad-band clicks.
, Those clicks in which the first and major acoustic wave applies negative pressure in
front of the earspeaker diaphragm are referred to as ____________ clicks. -
answerrarefaction
Those clicks in which the first and most prominent acoustic wave applies a positive
pressure in front of the earspeaker diaphragm are referred to as ___________ clicks. -
answercondensation
True or false: acoustical polarity is never reversed during transfer of the ear canal. -
answerFalse
it sometimes is
In certain conditions associated with severe, steep high-frequency hearing loss, BAEPs
elicited by rarefaction clicks may differ in ________, and to a degree in ________, from
BAEPs evoked by condensation clicks. - answerlatency
morphology
If no differences exist between differences between separate rarefaction and
condensation stimuli, why may it be beneficial to summate responses elicited by
separate rarefaction and condensation clicks? - answerit reduces artifact
Should increased latency differences between rarefaction and condensation stimuli be
interpreted as evidence of retrocochlear dysfunction? - answerNo
What are the stimulus rates employed for BAEPs?
At what rate are waves I, III, VI, and VII reduced in amplitude?
What stimulus rates are especially suited to resolve those peaks? - answer5-200/s
> 10/s
8-10/s
It is recommended that click intensity be acoustically calibrated in _____________. -
answerdecibels peak-equivalent sound pressure level
dB pe SPL
What are (2) examples of sound intensity measures that each laboratory should be
capable of converting its intensity measures to? - answerdB HL (decibels above normal
hearing level)
dB SL (decibels above sensation level)
At what intensity should the contralateral ear be masked by white noise? - answer60 dB
SPL
Why is the contralateral ear masked by white noise? - answerTo eliminate "crossover"
(bone-conducted) responses.
