When is calibrations performs? - ANSWER: At the start of each recording session
What amplifier and averager conditions should be impletmented when performing calibration? - ANSWER: Amplifier and recording paramters should replicate those of the first recording session
Define the waveform re...
When is calibrations performs? - ANSWER: ✔✔At the start of each recording session
What amplifier and averager conditions should be impletmented when performing calibration? -
ANSWER: ✔✔Amplifier and recording paramters should replicate those of the first recording session
Define the waveform replication criteria for latency and amplitude - ANSWER: ✔✔Latency replication
within 1% of the total sweep time
Amplitude replication within 15% of the peak to peak amplitude
Reference normative data may be utilized if two conditions are met. What are they? - ANSWER: ✔✔1.
Stimulus, recording and other conditions to reference lab
2. At least 20- normal subjects are studied and fall within the normal values
Define recommended system set up changes which are recommended for FF- PR-VEP when a marked
delay or absent recording is present - ANSWER: ✔✔1. Increase analysis time up to 500 ms.
2. Slower reversal rate of 2/sec or less 400 or more averages
List the 3 components which occur in the first 1.5 milliseconds after click stimulation at the ear -
ANSWER: ✔✔1. CM- Cochlear Microphonic
2. SP- Summating potential
3. AP- Action potential of the 8th Cranial Nerve
Name the generator of the first 2 components which occur in the first 1.5 milliseconds after click
stimulation - ANSWER: ✔✔Receptor potentials of the Cochlear hair cells
Define the label for the obligate peak recommended when recording. THe main component of the
auditory nerve action potential of the electrocephleagram - ANSWER: ✔✔N1
, Define the recording parameter which radically changes the CM of the BAEP and how it changes the
potential - ANSWER: ✔✔1. Alternating Click Polarity
2. Zeroes of cancels this potential
Define the most common clinical disease which changes this peak of the BAEP (first) and describe the
most common change seen - ANSWER: ✔✔- Summating potentials
- Menieres Disease
- SP Increases in Amplitude
Define the recording montage for auditory evoked potentials - ANSWER: ✔✔+ Input/ - Input
Cz/ A1
Cz/ A2
A2/ A1
What is the generator of the N1 of the ECOG? - ANSWER: ✔✔Distal portion of the 8th Cranial Nerve
What is the generator of the W1 of the BAEP? - ANSWER: ✔✔Distal portion of the 8th Nerve
What is the active electrode when recording the W1 of the BAEP? - ANSWER: ✔✔A1 or the electrode
ipsilateral to surgery
What is the polarity of wave 1 of the BAEP? - ANSWER: ✔✔Ear-Canal negative
What type of stimuli is recommended for BAEP? - ANSWER: ✔✔Broad band clicks in the 1,000-4,000 Hz
range
What is the recommended duration of the stimulis of BAEP? - ANSWER: ✔✔100 usec rectangular pulse
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