ACNS guidelines - BAER
ECochG consists of what 3 components? - answer1. cochlear microphonics
2. summating potential (SP)
3. auditory nerve AP
Normal latency of "short-latency auditory EPs" (BAER and ECochG) - answer Within
10-15msec of stimulus
Cochlear microphonics and summating potential are receptor potentials of what? -
answer Cochlear hair cells
What does vertex-negative/positive truly refer to? - answer Positivity or negativity of one
electrode at the vertex relative to another electrode over earlobe/mastoid process. Does
NOT indicate polarity of each electrical event
Type of stimulus used in BAERs - answer broad-band clicks
Definition of broad-band clicks - answer acoustic energy is spread over a wide range of
audio frequencies
Pulse - answer100usec rectangular pulse - monophasic square wave
Click's "electrical waveform" - answerWaveform of the driving pulse
Click's "acoustical waveform" - answerSound pressure waveform
Rarefaction click polarity - answerNegative pressure on diaphragm
Condensation click polarity - answerPositive pressure on diaphragm
BAER stimulus rate - answer5-200/sec
Stim rates higher than ____ can reduce amp in waves 1, 2, 6, and 7 - answer10/sec
Stim intensity units - answerdB pe SPL
dB pe SPL is what? - answerdecibels peak-equivalent sound pressure level
What is dB HL? - answer"dB above normal hearing level" - dB above the average
hearing threshold of a group of normal adults
ECochG consists of what 3 components? - answer1. cochlear microphonics
2. summating potential (SP)
3. auditory nerve AP
Normal latency of "short-latency auditory EPs" (BAER and ECochG) - answer Within
10-15msec of stimulus
Cochlear microphonics and summating potential are receptor potentials of what? -
answer Cochlear hair cells
What does vertex-negative/positive truly refer to? - answer Positivity or negativity of one
electrode at the vertex relative to another electrode over earlobe/mastoid process. Does
NOT indicate polarity of each electrical event
Type of stimulus used in BAERs - answer broad-band clicks
Definition of broad-band clicks - answer acoustic energy is spread over a wide range of
audio frequencies
Pulse - answer100usec rectangular pulse - monophasic square wave
Click's "electrical waveform" - answerWaveform of the driving pulse
Click's "acoustical waveform" - answerSound pressure waveform
Rarefaction click polarity - answerNegative pressure on diaphragm
Condensation click polarity - answerPositive pressure on diaphragm
BAER stimulus rate - answer5-200/sec
Stim rates higher than ____ can reduce amp in waves 1, 2, 6, and 7 - answer10/sec
Stim intensity units - answerdB pe SPL
dB pe SPL is what? - answerdecibels peak-equivalent sound pressure level
What is dB HL? - answer"dB above normal hearing level" - dB above the average
hearing threshold of a group of normal adults
