Kahoot Review Questions Flashcards
What type of transducer is recommended for ABR testing?
Insert earphones
With this kind of polarity, the TM is displaced laterally
Rarefaction
The SNRAVG is determined by input signal amplitude/output signal amplitude times what?
Square root of # of averages
Majority of frequency energy in cortical response is below:
15 Hz
An 8-bit A/D converter has an amplitude resolution of how many points?
256
60-Hz line noise would correspond to what period?
17 ms
Increasing the # of averages has what effect on the response?
Increases the SNR
An increase in rate corresponds to what increase in latency in normal ears?
0.1 ms/10 Hz
The use of this polarity may result in earlier Wave V latencies
Rarefaction
With a 25k sampling rate, a conversion is made every 40 microsec and is known as the
dwell time
What would be an appropriate rate for an ABR?
21.1 Hz
How much amplification is applied to ABR recordings?
100k
An appropriate filtering range for Cortical (late potentials) would be:
1-40 Hz
What ASSR rate produces the largest response in awake adults?
40 Hz
ASSR is different from the ABR in all but the following ways:
ASSR requires neural synchrony
What is a disadvantage of ASSR?
Good predictor of normal hearing thresholds
What can be done to prevent adaptation?
Use an amplitude-modulated tone
The ASSR frequency that is being tested is known as the:
Carrier frequency
ASSR uses an automatic detection algorithm to evaluate frequency strength and…
Phase coherence
What is the appropriate modulation rate for evaluating the cortex?
20 Hz
Which ASSR rate is not affected by sleep state?
80 Hz
What statistic is used to determine if the power of the response> EEG noise?
F-test
At what age is the ASSR more easily detected?
3 weeks
What is a risk factor for hearing loss?
An Apgar score of 0-6 at 5 minutes
What is considered an adequately low referral rate for screening ABR?
<4%
Sedatives have the greatest effect on…
Late potentials
The following pattern may indicate severe brainstem dysfunction:
Waves absent above Waves I and II
Under what circumstances would a slight Wave I-V prolongation be a concern?
Young female
Under what circumstance would you find peak latencies equally shifted across intensity levels?
Conductive hearing loss
Responses to click stimuli are in greatest agreement with thresholds in what frequency range?
2-4 kHz
Interaural latency differences should not exceed:
0.2 to 0.3 ms
The following montage increases the separation between Waves IV and V:
Vertical with contralateral reference
The following montage increases Wave I amplitude:
Horizontal montage
The absence of otoferlin results in:
Abolishing calcium-triggered exocytosis
What is a factor that increases the likelihood of a Bifid Wave I?
High stimulus level
What is the electrode that is placed in the ear canal but does not touch the TM?
Tip-trode
Which of the ECochG components produces direct current for the duration of the stimulus?
Summating potential
Children discharged from the neonatal intensive care unit (NICU) who show absent ABRs…
have thresholds that cannot be reliably estimated from ABRs
The ECochG responses recorded from children discharged from the NICU show…
prolonged duration in more than half of patients
Which electrode is placed on the surface of the TM?
Tymptrode
Which of the following ECochG reflects alternating current from OHCs at basal turn of cochlea?
Cochlear microphonic
What is the most commonly used analysis technique for ECochG recordings in Meinere’s diagnosis?
Ratio of SP/AP amplitude
When will the ABR in children with ANSD not be present?
Recording to stimuli with alternating polarities
What is the minimum inter-aural latency difference that may suggest retrocochlear pathology?
0.2 ms
The normal intra-wave I-V delay is…
~4 ms
What would a large peak following wave V indicate?
Post-auricular muscle artifact
What is a response to a stimulus that is not time locked?
Induced
What is an example of a following response?
40 Hz
Which structure does not have spatially aligned dendrites?
Thalamus
How could you describe an action potential?
Fast changes in membrane potential that last 1 ms
What are + and - voltages separated in space called?
Dipoles
Which evoked response is labeled with roman numerals?
ABR
What carries information from 1 neural structure to the next?
Action potential
Which surgical approach allows good access to the root entry zone of the auditory nerve?
Retrosigmoid
Which surgical approach is best for avoiding facial nerve damage?
Translabyrinthine
Which surgery approaches allow the possibility of hearing preservation?
Retrosigmoid and middle fossa
What is not a good indicator for IOM?
When the patient has no insurance
What are the components of the AN-CAP?
N1 and P1
What is the name of the damage that is caused by interrupted blood supply?
Ischemic
Children with speech-in-noise deficits have the following FFR abnormalities…
Prolonged latencies in noise
What behavioral-FFR relationship was found in toddlers?
Consonants-in-noise score relates to phonological processing
What FFR characteristics are found in children with autism?
Disrupted pitch tracking
Older adults with poor speech-in-noise performance have the following FFR characteristics…
Greater degradative effects of noise
Older adults have the following FFR characteristics compared to younger adults…
Lower phase locking
The ABR may miss a tumor because…
The ABR may not show abnormalities when the tumor is small
Under what circumstance would you not expect to find significant interaural latency differences…
Unilateral mild sensorineural hearing loss
When using Blackman ramping, the duration of the envelope for 1000 Hz would be…
4 sec., 2 sec
What is an appropriate rate when performing threshold testing in babies?
39.1 Hz
What polarity should be used with bone conduction testing?
Alternating
At what wave peak to trough amplitude should you stop averaging?
40 nV or more
When is a “no response” detected?
You have a flat waveform with residual noise that is <25 nV
At what age are ABR latencies the earliest?
5-8 years old
What is a sex effect on ABR?
Earlier latencies and larger amplitudes in females
