ACNS guidelines – BAER Questions With Complete Solutions

ECochG consistes of what 3 components? correct answer: 1. cochlear microphonics 2. summating potential (SP) 3. auditory nerve AP Normal latency of "short-latency auditory EPs" (BAER and ECochG) correct answer: Within 10-15msec of stimulus Cochlear microphonics and summating potential are receptor potentials of what? correct answer: Cochlear hair cells What does vertex-negative/positive truly refer to? correct 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 correct answer: broad-band clicks Definition of broad-band clicks correct answer: acoustic energy is spread over a wide range of audio frequencies Pulse correct answer: 100usec rectangular pulse - monophasic square wave Click's "electrical waveform" correct answer: Waveform of the driving pulse Click's "acoustical waveform" correct answer: Sound pressure waveform Rarefaction click polarity correct answer: Negative pressure on diaphragm Condensation click polarity correct answer: Positive pressure on diaphragm BAER stimulus rate correct answer: 5-200/sec Stim rates higher than ____ can reduce amp in waves 1, 2, 6,