Auditory Evoked Potentials Quiz

What is the primary difference between action potentials and postsynaptic potentials in neurons?

• a) Action potentials cause graded changes in voltage, while postsynaptic potentials are discrete voltage spikes

• b) Action potentials travel down the axon, while postsynaptic potentials arise at synaptic junctions

• c) Action potentials last for longer periods, while postsynaptic potentials are very brief

• d) Action potentials occur in response to neurotransmitters, while postsynaptic potentials are independent of them

What is the primary purpose of signal averaging in AEPs?

• To increase the amplitude of the response

• To reduce background noise

• To measure the latency of responses

• To enhance the invasiveness of the procedure

What is a key factor for summated voltages to be recordable at the scalp?

• Random orientations of neurons

• Simultaneous occurrence across many neurons

• Low resistance of the skull

• Inhibitory neurotransmitter effects

Which type of potentials are affected by physical parameters of the stimulus?

• Endogenous potentials

• Exogenous potentials

• Motor potentials

• Cognitive potentials

What type of recording is typically used in clinical settings for AEPs?

• Single-unit recording

• Invasive recording

• Far-field recording

• Near-field recording

Which of the following is a classic example of an endogenous potential?

• P300

• Cochlear Microphonic (CM)

• Middle Latency Response (MLR)

• Auditory Brainstem Response (ABR)

What is the main use of short latency AEPs?

• To measure long-term memory

• To obtain threshold information

• To assess cognitive function

• To evaluate motor responses

What is the effect of reducing the stimulus rate during AEP testing?

• Increases detail in response

• Decreases response amplitude

• Reduces the accuracy of readings

• Increases background noise

Which recording technique involves measuring voltage or current across the membrane of a single cell?

• a) Extracellular recording

• 
  b) Multi-unit recording

• 
  c) Intracellular recording

• d) Single-unit recording

__________ responses are elicited by specific external stimuli, while __________ responses are ongoing electrical potentials without external stimuli.