Electrophysiology

The click is often used in abr stimulation because it evokes;

• A frequency-specific response

• Synchronous neural firing

• Otoacoustic emissions that, in turn, produce the ABR

• An specific ABR without the need for masking

• None of the above

Which type of neuron is thought to be involved in generation of ABR

• Pauser neurons

• Inner hair cells

• Offset neurons

• Chopper neurons

• Onset neurons

The ABR wave V evoked by the stimulation of the right ear is generated from ......

• The inferior colliculus on the rt side of brainstem

• The lateral lemniscus on the left side of the brainstem

• The lateral lemniscus on the right side of the brainstem

• The inferior colliculus on the left side of the brain stem

Which dipole orientation is generate higher amplitude in evoked potentials

• Open field orientation of neurons

• Closed loop orientation of neurons

• Open and close field orientation

• Amplitude has no correlation with dipole orientation

Which of the following best describes the relation between abr wave v latency and tone burst frequency

• Latency decreases as tone burst frequency decreases

• Absolute latency is constant but inter-wave latency increases

• There is no systematic relation

• Latency increases as tone burst frequency decreases

• Latency is increased only for 500 hz versus click stimulus

Choose the correct statement

• Wave I consists of relatively lower frequency energy whereas wave v receives a greater contribution from higher frequencies

• Wave I consists of relatively high frequency energy whereas wave V receives a greater contribution from lower frequencies

• Wave I and wave V consists of high frequencies only

• Wave I and wave V consists of low frequencies only

What information is critical for filter settings used in recording AERs

• Frequency of the stimulus

• Amplitude of the response

• Stimulus rate

• Spectrum of the response

• Age of the patient

What is the term used for a technique used in obtaining an adequate SNR in AER recording

• Notch filtering

• Re-amplification

• Artifact enhancement

• Common mode detection

• Signal averaging

P300, AMLR, ALLR- find out the correct pairs from the options

• Endogenous, Endogenous, Endogenous

• Endogenous, Exogenous, both endogenous and exogenous

• Endogenous, endogenous, both endogenous and exogenous

• Exogenous, endogenous, exogenous

• Endogenous, both, both

Reducing the low pass filter cutoff from 3000 to 1500Hz results;

• Increasing absolute latencies and producing smoothing effect on waveform

• Decreaseing absolute latencies and produce smoothing effect on the waveform

• Increasing absolute latencies and producing sharper effect on waveform

• Poducing sharper waveform