SOAL POST TEST EXAM STUDY GUIDE 2026
FULL QUESTIONS AND ANSWERS GRADED A+
◉ double referencing may be beneficial for:
A. reducing ECG artifact in the EEG or eye channels
B. reducing sweat or respiration artifact in the EEG or eye channels
C. reducing popping artifact in the EEG or eye channels
D. all of the above. Answer: A. reducing ECG artifact in the EEG or eye
channels
◉ if the thermistor becomes removed during a study, causing a flat
line in the airflow channel, the best solution is to:
A. try re-referencing the air flow channel to one of the respiratory
effort channels
B. continue increasing the amplifier sensitivity until a signal
response is seen
C. turn off the channel
D. enter the patients room quietly and readjust thermistor. Answer:
D. enter the patients room quietly and readjust thermistor
◉ When an artifact is present, changing the high and low frequency
filters:
A. is the best way to maintain an artifact-free recording
, B. is only effective if the underlying physiological signals are still
intact
C. should only be used as a last resort when other methods of
correcting the artifact are unavailable
D. B & C are correct. Answer: D. B & C are correct
◉ the preferred type of amplifier in polysomnography is:
A. single ended
B. triple ended
C. differential
D. multifrequency. Answer: C. differential
◉ high and unequal electrode impedances:
A. are common causes of recording artifact
B. inhibit the flow of physiological signs from the patient
C. promote the passage of interfering signals to the differential
amplifier
D. All of the above. Answer: D. All of the above
◉ the polarity convention for electrophysiology states that when G1
is more negative then G2, the pen:
A. will not deflect
B. will deflect up
FULL QUESTIONS AND ANSWERS GRADED A+
◉ double referencing may be beneficial for:
A. reducing ECG artifact in the EEG or eye channels
B. reducing sweat or respiration artifact in the EEG or eye channels
C. reducing popping artifact in the EEG or eye channels
D. all of the above. Answer: A. reducing ECG artifact in the EEG or eye
channels
◉ if the thermistor becomes removed during a study, causing a flat
line in the airflow channel, the best solution is to:
A. try re-referencing the air flow channel to one of the respiratory
effort channels
B. continue increasing the amplifier sensitivity until a signal
response is seen
C. turn off the channel
D. enter the patients room quietly and readjust thermistor. Answer:
D. enter the patients room quietly and readjust thermistor
◉ When an artifact is present, changing the high and low frequency
filters:
A. is the best way to maintain an artifact-free recording
, B. is only effective if the underlying physiological signals are still
intact
C. should only be used as a last resort when other methods of
correcting the artifact are unavailable
D. B & C are correct. Answer: D. B & C are correct
◉ the preferred type of amplifier in polysomnography is:
A. single ended
B. triple ended
C. differential
D. multifrequency. Answer: C. differential
◉ high and unequal electrode impedances:
A. are common causes of recording artifact
B. inhibit the flow of physiological signs from the patient
C. promote the passage of interfering signals to the differential
amplifier
D. All of the above. Answer: D. All of the above
◉ the polarity convention for electrophysiology states that when G1
is more negative then G2, the pen:
A. will not deflect
B. will deflect up
