COMPREHENSIVE EEG BOARD EXAM
PREPARATION (ABRET R.EEG.T.
LEVEL) QUESTIONS AND ANSWERS
100% VERIFIED. JUST RELEASED
1. A differential amplifier has an input 1 of -50 µV and an input 2 of -20 µV. What is the
resulting output recorded by the EEG machine?
A. -70 µV
B. -30 µV
C. +30 µV
D. +70 µV
Answer: B
Conceptual Explanation: Differential amplifiers follow the formula (Input 1 - Input 2).
Therefore, (-50) - (-20) = -30 µV.
2. Which of the following describes the ‘Nyquist Theorem’ in digital EEG signal processing?
A. The sensitivity must be adjusted according to the patient’s age.
B. The impedance of electrodes must be below 5,000 ohms.
C. The sampling rate must be at least twice the highest frequency of interest.
D. The high-frequency filter must be set at 70 Hz to prevent aliasing.
,Answer: C
Conceptual Explanation: The Nyquist Theorem states that to accurately reconstruct a
signal, the sampling rate must be at least double the highest frequency component (the
Nyquist frequency) to prevent aliasing.
3. During a neonatal EEG, ‘Delta Brushes’ are most commonly seen at which conceptual age?
A. 24-28 weeks
B. Pre-term only, vanishing by 28 weeks
C. 40-42 weeks
D. 32-34 weeks
Answer: D
Conceptual Explanation: Delta brushes are a hallmark of the premature infant’s EEG,
reaching their peak expression around 32-34 weeks conceptual age and disappearing by
full term.
4. If the Low Frequency Filter is changed from 1 Hz to 5 Hz, how will the EEG appearance
change?
A. Slow waves will appear taller (increased amplitude).
B. Slow waves will appear shorter (decreased amplitude).
C. Fast activity will be attenuated.
D. There will be no change to the morphology of slow waves.
, Answer: B
Conceptual Explanation: Increasing the LFF (e.g., from 1 to 5 Hz) filters out more slow
activity, resulting in the attenuation and decreased amplitude of slow waves.
5. In the International 10-20 System, what is the distance from Fp1 to F3 if the total distance
from Fp1 to O1 is 24 cm?
A. 6.0 cm
B. 4.8 cm
C. 12.0 cm
D. 2.4 cm
Answer: A
Conceptual Explanation: The distance from Fp1 to F3 is 25% of the distance from Fp1 to
O1. 24 cm * 0.25 = 6.0 cm.
6. Which clinical condition is most strongly associated with Periodic Lateralized Epileptiform
Discharges (LPDs/PLEDs)?
A. Absence epilepsy
B. Acute ischemic stroke
C. Ethosuximide toxicity
D. Benign Rolandic Epilepsy
Answer: B
PREPARATION (ABRET R.EEG.T.
LEVEL) QUESTIONS AND ANSWERS
100% VERIFIED. JUST RELEASED
1. A differential amplifier has an input 1 of -50 µV and an input 2 of -20 µV. What is the
resulting output recorded by the EEG machine?
A. -70 µV
B. -30 µV
C. +30 µV
D. +70 µV
Answer: B
Conceptual Explanation: Differential amplifiers follow the formula (Input 1 - Input 2).
Therefore, (-50) - (-20) = -30 µV.
2. Which of the following describes the ‘Nyquist Theorem’ in digital EEG signal processing?
A. The sensitivity must be adjusted according to the patient’s age.
B. The impedance of electrodes must be below 5,000 ohms.
C. The sampling rate must be at least twice the highest frequency of interest.
D. The high-frequency filter must be set at 70 Hz to prevent aliasing.
,Answer: C
Conceptual Explanation: The Nyquist Theorem states that to accurately reconstruct a
signal, the sampling rate must be at least double the highest frequency component (the
Nyquist frequency) to prevent aliasing.
3. During a neonatal EEG, ‘Delta Brushes’ are most commonly seen at which conceptual age?
A. 24-28 weeks
B. Pre-term only, vanishing by 28 weeks
C. 40-42 weeks
D. 32-34 weeks
Answer: D
Conceptual Explanation: Delta brushes are a hallmark of the premature infant’s EEG,
reaching their peak expression around 32-34 weeks conceptual age and disappearing by
full term.
4. If the Low Frequency Filter is changed from 1 Hz to 5 Hz, how will the EEG appearance
change?
A. Slow waves will appear taller (increased amplitude).
B. Slow waves will appear shorter (decreased amplitude).
C. Fast activity will be attenuated.
D. There will be no change to the morphology of slow waves.
, Answer: B
Conceptual Explanation: Increasing the LFF (e.g., from 1 to 5 Hz) filters out more slow
activity, resulting in the attenuation and decreased amplitude of slow waves.
5. In the International 10-20 System, what is the distance from Fp1 to F3 if the total distance
from Fp1 to O1 is 24 cm?
A. 6.0 cm
B. 4.8 cm
C. 12.0 cm
D. 2.4 cm
Answer: A
Conceptual Explanation: The distance from Fp1 to F3 is 25% of the distance from Fp1 to
O1. 24 cm * 0.25 = 6.0 cm.
6. Which clinical condition is most strongly associated with Periodic Lateralized Epileptiform
Discharges (LPDs/PLEDs)?
A. Absence epilepsy
B. Acute ischemic stroke
C. Ethosuximide toxicity
D. Benign Rolandic Epilepsy
Answer: B
