ASET EEG Registry Exam Study Guide 2026
| 75 Original Practice Questions with
Answers & Detailed Rationales grade A +
1. Which EEG rhythm is typically dominant in a relaxed, awake adult with eyes closed?
A. Delta
B. Theta
C. Alpha
D. Gamma
Answer: C. Alpha
Alpha activity (8–13 Hz) is the normal posterior dominant rhythm in relaxed, awake adults with their
eyes closed and attenuates when the eyes open.
2. The International 10–20 System is primarily used to:
A. Measure blood pressure
B. Standardize EEG electrode placement
C. Diagnose stroke
D. Measure intracranial pressure
Answer: B. Standardize EEG electrode placement
The 10–20 System provides consistent electrode locations based on head measurements.
3. Which electrode is located at the vertex of the scalp?
A. Fp1
B. Cz
C. O2
D. T6
Answer: B. Cz
The "C" electrodes represent central locations, with Cz located at the vertex.
,4. Hyperventilation is commonly performed during EEG to:
A. Reduce muscle artifact
B. Increase cerebral excitability and reveal abnormalities
C. Lower electrode impedance
D. Improve ECG recordings
Answer: B. Increase cerebral excitability and reveal abnormalities
Hyperventilation may provoke generalized slowing or certain seizure patterns in susceptible patients.
5. Which frequency range defines alpha activity?
A. 0.5–4 Hz
B. 4–8 Hz
C. 8–13 Hz
D. 13–30 Hz
Answer: C. 8–13 Hz
Alpha rhythm is the normal posterior dominant rhythm in awake adults.
6. Which frequency range corresponds to beta activity?
A. 0.5–4 Hz
B. 4–8 Hz
C. 8–13 Hz
D. 13–30 Hz
Answer: D. 13–30 Hz
Beta activity is a faster rhythm often seen frontally and may increase with certain medications.
7. Which EEG rhythm is most commonly associated with deep sleep?
A. Alpha
B. Beta
C. Delta
D. Gamma
Answer: C. Delta
Delta waves (0.5–4 Hz) predominate during deep stages of non-REM sleep.
, 8. Excessive electrode impedance may result in:
A. Poor signal quality and increased artifact
B. Improved waveform resolution
C. Faster EEG rhythms
D. Lower heart rate
Answer: A. Poor signal quality and increased artifact
Maintaining low, balanced electrode impedance helps produce reliable recordings.
9. Which artifact is commonly produced by eye blinks?
A. ECG artifact
B. Electrode pop
C. Slow frontal deflections
D. 60-Hz interference
Answer: C. Slow frontal deflections
Eye blinks create large slow waves that are most prominent in frontal electrodes.
10. Which procedure commonly uses flashing lights to activate EEG abnormalities?
A. Hyperventilation
B. Photic stimulation
C. Sleep deprivation
D. Calibration
Answer: B. Photic stimulation
Intermittent photic stimulation can provoke photoparoxysmal responses in susceptible individuals.
11. Which electrode pair is commonly used to monitor eye movements?
A. O1–O2
B. Fp1–Fp2
C. T3–T4
D. P3–P4
Answer: B. Fp1–Fp2
Frontal electrodes are sensitive to eye movement artifacts because of their proximity to the eyes.
12. Which rhythm is commonly seen during drowsiness?
| 75 Original Practice Questions with
Answers & Detailed Rationales grade A +
1. Which EEG rhythm is typically dominant in a relaxed, awake adult with eyes closed?
A. Delta
B. Theta
C. Alpha
D. Gamma
Answer: C. Alpha
Alpha activity (8–13 Hz) is the normal posterior dominant rhythm in relaxed, awake adults with their
eyes closed and attenuates when the eyes open.
2. The International 10–20 System is primarily used to:
A. Measure blood pressure
B. Standardize EEG electrode placement
C. Diagnose stroke
D. Measure intracranial pressure
Answer: B. Standardize EEG electrode placement
The 10–20 System provides consistent electrode locations based on head measurements.
3. Which electrode is located at the vertex of the scalp?
A. Fp1
B. Cz
C. O2
D. T6
Answer: B. Cz
The "C" electrodes represent central locations, with Cz located at the vertex.
,4. Hyperventilation is commonly performed during EEG to:
A. Reduce muscle artifact
B. Increase cerebral excitability and reveal abnormalities
C. Lower electrode impedance
D. Improve ECG recordings
Answer: B. Increase cerebral excitability and reveal abnormalities
Hyperventilation may provoke generalized slowing or certain seizure patterns in susceptible patients.
5. Which frequency range defines alpha activity?
A. 0.5–4 Hz
B. 4–8 Hz
C. 8–13 Hz
D. 13–30 Hz
Answer: C. 8–13 Hz
Alpha rhythm is the normal posterior dominant rhythm in awake adults.
6. Which frequency range corresponds to beta activity?
A. 0.5–4 Hz
B. 4–8 Hz
C. 8–13 Hz
D. 13–30 Hz
Answer: D. 13–30 Hz
Beta activity is a faster rhythm often seen frontally and may increase with certain medications.
7. Which EEG rhythm is most commonly associated with deep sleep?
A. Alpha
B. Beta
C. Delta
D. Gamma
Answer: C. Delta
Delta waves (0.5–4 Hz) predominate during deep stages of non-REM sleep.
, 8. Excessive electrode impedance may result in:
A. Poor signal quality and increased artifact
B. Improved waveform resolution
C. Faster EEG rhythms
D. Lower heart rate
Answer: A. Poor signal quality and increased artifact
Maintaining low, balanced electrode impedance helps produce reliable recordings.
9. Which artifact is commonly produced by eye blinks?
A. ECG artifact
B. Electrode pop
C. Slow frontal deflections
D. 60-Hz interference
Answer: C. Slow frontal deflections
Eye blinks create large slow waves that are most prominent in frontal electrodes.
10. Which procedure commonly uses flashing lights to activate EEG abnormalities?
A. Hyperventilation
B. Photic stimulation
C. Sleep deprivation
D. Calibration
Answer: B. Photic stimulation
Intermittent photic stimulation can provoke photoparoxysmal responses in susceptible individuals.
11. Which electrode pair is commonly used to monitor eye movements?
A. O1–O2
B. Fp1–Fp2
C. T3–T4
D. P3–P4
Answer: B. Fp1–Fp2
Frontal electrodes are sensitive to eye movement artifacts because of their proximity to the eyes.
12. Which rhythm is commonly seen during drowsiness?
