Audiology Praxis Study
Guide Questions and
Answers
When should an IFSP be implemented? - Answer-Individualized Family Service Plan
Appropriate if child is < 3 years
When should an IEP be implemented? - Answer-Individualized Education Program
Appropriate if child is > = 3 years
Why can't you use pure tones in the sound field? - Answer-Pure tones reverberate
readily and produce standing waves
How large of a difference between ears on calorics is needed for it to be considered
clinically significant? - Answer->= 20%
What happens to ABR in situations of cochlear/neural HL? - Answer-Steeper than
average L/I functions (longer LF latencies, shorter HF latencies)
What happens to ABR in situations of conductive HL? - Answer-Longer latencies -
normal interwave latencies
Differential Dx for auditory neuropathy - Answer-Disproportionately worse WRS than
expected
Normal OAEs
Absent ABR
Best rate for ABR? - Answer-27.1/sec
What is the dynamic range of OHC function? - Answer-50 - 60dB
What is the dynamic range of IHC function? - Answer-60dB (~35 --> 95dB)
Stimulus characteristics of TEOAEs? - Answer-80msec (milli vs/ micro?) broadband
click
, 80 - 86dBSPL
Static evaluation for vestibular function - Answer-inspection for spontaneous/gaze
nystagmus
Patient is not moved
Dynamic evaluation for vestibular function - Answer-Patient is moved using variety of
motion testing to see if nystagmus could be stimulated
What structure is stimulated in Dix-Hallpike Testing? - Answer-Posterior Semicircular
Canal
Endolympth - Answer-Positive (+80mV) charged fluid in Scala Media
Perilympth - Answer-Neutral (0 - +5mV) charged fluid in Scali Tympani + Vestibuli
Charge of IHCs - Answer--45mV (less negative)
Charge of OHCs - Answer--70mV (more negative)
Where is human hearing MOST sensitive? - Answer-Around 2000 - 4000Hz ( Fletcher-
Munson curve)
When does the ABR mature? - Answer-18 months
How long does it take to measure an ABR? - Answer-1.5 - 10msec
When does an MLR occur? - Answer-10 - 80msec
When are late responses measured - Answer-80 - 500msec
What is a cochlear microphonic? - Answer-Summed response of OHCs. ECoG
Where is Wave I of ABR? - Answer-Distal portion of CNVIIII
Where is Wave II of ABR? - Answer-Proximal portion of CNVIII
Where is Wave III of ABR? - Answer-Cochlear Nuculi
Where is Wave IV of ABR? - Answer-Unknown? Multiple bilateral origins
Where is Wave V of ABR? - Answer-Lateral lemniscus termination in contralateral
inferior colliculus
TEOAE response - Answer-6dBSPL above noise floor
Guide Questions and
Answers
When should an IFSP be implemented? - Answer-Individualized Family Service Plan
Appropriate if child is < 3 years
When should an IEP be implemented? - Answer-Individualized Education Program
Appropriate if child is > = 3 years
Why can't you use pure tones in the sound field? - Answer-Pure tones reverberate
readily and produce standing waves
How large of a difference between ears on calorics is needed for it to be considered
clinically significant? - Answer->= 20%
What happens to ABR in situations of cochlear/neural HL? - Answer-Steeper than
average L/I functions (longer LF latencies, shorter HF latencies)
What happens to ABR in situations of conductive HL? - Answer-Longer latencies -
normal interwave latencies
Differential Dx for auditory neuropathy - Answer-Disproportionately worse WRS than
expected
Normal OAEs
Absent ABR
Best rate for ABR? - Answer-27.1/sec
What is the dynamic range of OHC function? - Answer-50 - 60dB
What is the dynamic range of IHC function? - Answer-60dB (~35 --> 95dB)
Stimulus characteristics of TEOAEs? - Answer-80msec (milli vs/ micro?) broadband
click
, 80 - 86dBSPL
Static evaluation for vestibular function - Answer-inspection for spontaneous/gaze
nystagmus
Patient is not moved
Dynamic evaluation for vestibular function - Answer-Patient is moved using variety of
motion testing to see if nystagmus could be stimulated
What structure is stimulated in Dix-Hallpike Testing? - Answer-Posterior Semicircular
Canal
Endolympth - Answer-Positive (+80mV) charged fluid in Scala Media
Perilympth - Answer-Neutral (0 - +5mV) charged fluid in Scali Tympani + Vestibuli
Charge of IHCs - Answer--45mV (less negative)
Charge of OHCs - Answer--70mV (more negative)
Where is human hearing MOST sensitive? - Answer-Around 2000 - 4000Hz ( Fletcher-
Munson curve)
When does the ABR mature? - Answer-18 months
How long does it take to measure an ABR? - Answer-1.5 - 10msec
When does an MLR occur? - Answer-10 - 80msec
When are late responses measured - Answer-80 - 500msec
What is a cochlear microphonic? - Answer-Summed response of OHCs. ECoG
Where is Wave I of ABR? - Answer-Distal portion of CNVIIII
Where is Wave II of ABR? - Answer-Proximal portion of CNVIII
Where is Wave III of ABR? - Answer-Cochlear Nuculi
Where is Wave IV of ABR? - Answer-Unknown? Multiple bilateral origins
Where is Wave V of ABR? - Answer-Lateral lemniscus termination in contralateral
inferior colliculus
TEOAE response - Answer-6dBSPL above noise floor
