5. Electrophysiology

Electrophys Troubleshooting — Quiz

Test your understanding of electrophys troubleshooting with 5 practice questions.

Practice Questions

Question 1

When performing an Auditory Brainstem Response (ABR) recording, if the recorded waveform exhibits a significant amount of $50 \text{ Hz}$ or $60 \text{ Hz}$ interference, which of the following is the most appropriate initial action to take to identify the source of the artifact?

Question 2

In the context of evoked potential recordings, a low Common Mode Rejection Ratio (CMRR) in the differential amplifier primarily leads to which of the following consequences?

Question 3

During an evoked potential recording, you observe a sudden, large, transient deflection in the waveform that is not related to the stimulus. Which of the following is the most likely cause of this artifact?

Question 4

To minimize electrical interference from external sources during evoked potential recordings, which of the following best describes a crucial environmental best practice?

Question 5

If an evoked potential recording system has an input impedance of $2 \text{ M}\Omega$ and the electrode impedance is $5 \text{ k}\Omega$, what is the approximate voltage drop across the electrode-skin interface, assuming a noise current of $2 \text{ nA}$?