ADVANCED EEG BOARD EXAM
PREPARATION GUIDE EXAM PREP
QUESTIONS AND ANSWERS 100%
VERIFIED. JUST RELEASED
1. What is the primary function of the Differential Amplifier in EEG instrumentation?
A. To increase the impedance of the electrodes to improve signal quality.
B. To filter out high-frequency muscle artifacts while preserving brain activity.
C. To convert analog signals into digital data using binary code.
D. To amplify the difference in voltage between two input signals and reject common
signals.
Answer: D
Conceptual Explanation: The differential amplifier’s main role is Common Mode Rejection
(CMRR), which subtracts identical signals (noise) shared by both inputs and amplifies the
difference between them.
,2. According to the Nyquist Theorem, what is the minimum sampling rate required for a 70 Hz
signal?
A. 70 Hz
B. 140 Hz
C. 210 Hz
D. 280 Hz
Answer: B
Conceptual Explanation: The Nyquist Theorem states that the sampling rate must be at
least twice the highest frequency component of the signal to prevent aliasing.
3. Which of the following describes the ‘End-of-Chain’ phenomenon in a bipolar montage?
A. The maximum amplitude is seen at the last electrode in a derivation string without a
phase reversal.
B. A phase reversal occurs at the site of maximum positivity.
C. The signal cancels out because the inputs are equal.
D. A flat line appears due to electrode popping at the end of the chain.
Answer: A
Conceptual Explanation: In bipolar montages, if the maximum voltage is at the first or last
electrode of a chain, a phase reversal cannot be completed, resulting in an end-of-chain
deflection.
, 4. What is the most likely clinical correlate for FIRDA (Frontal Intermittent Rhythmical Delta
Activity) in an adult?
A. Non-specific encephalopathy or increased intracranial pressure.
B. Focused structural lesion in the occipital lobe.
C. Specific diagnosis of Absence Epilepsy.
D. Normal variants of drowsiness.
Answer: A
Conceptual Explanation: FIRDA is generally considered a non-specific indicator of diffuse
encephalopathy, subcortical dysfunction, or midline structural issues.
5. In the 10-20 System, the distance from Nasion to Inion is 36 cm. What is the distance from
Nasion to Fz?
A. 3.6 cm
B. 10.8 cm
C. 7.2 cm
D. 18.0 cm
Answer: B
Conceptual Explanation: Fz is 30% of the distance from the Nasion (10% to Fp plus 20%
to Fz). 30% of 36 cm is 10.8 cm.
PREPARATION GUIDE EXAM PREP
QUESTIONS AND ANSWERS 100%
VERIFIED. JUST RELEASED
1. What is the primary function of the Differential Amplifier in EEG instrumentation?
A. To increase the impedance of the electrodes to improve signal quality.
B. To filter out high-frequency muscle artifacts while preserving brain activity.
C. To convert analog signals into digital data using binary code.
D. To amplify the difference in voltage between two input signals and reject common
signals.
Answer: D
Conceptual Explanation: The differential amplifier’s main role is Common Mode Rejection
(CMRR), which subtracts identical signals (noise) shared by both inputs and amplifies the
difference between them.
,2. According to the Nyquist Theorem, what is the minimum sampling rate required for a 70 Hz
signal?
A. 70 Hz
B. 140 Hz
C. 210 Hz
D. 280 Hz
Answer: B
Conceptual Explanation: The Nyquist Theorem states that the sampling rate must be at
least twice the highest frequency component of the signal to prevent aliasing.
3. Which of the following describes the ‘End-of-Chain’ phenomenon in a bipolar montage?
A. The maximum amplitude is seen at the last electrode in a derivation string without a
phase reversal.
B. A phase reversal occurs at the site of maximum positivity.
C. The signal cancels out because the inputs are equal.
D. A flat line appears due to electrode popping at the end of the chain.
Answer: A
Conceptual Explanation: In bipolar montages, if the maximum voltage is at the first or last
electrode of a chain, a phase reversal cannot be completed, resulting in an end-of-chain
deflection.
, 4. What is the most likely clinical correlate for FIRDA (Frontal Intermittent Rhythmical Delta
Activity) in an adult?
A. Non-specific encephalopathy or increased intracranial pressure.
B. Focused structural lesion in the occipital lobe.
C. Specific diagnosis of Absence Epilepsy.
D. Normal variants of drowsiness.
Answer: A
Conceptual Explanation: FIRDA is generally considered a non-specific indicator of diffuse
encephalopathy, subcortical dysfunction, or midline structural issues.
5. In the 10-20 System, the distance from Nasion to Inion is 36 cm. What is the distance from
Nasion to Fz?
A. 3.6 cm
B. 10.8 cm
C. 7.2 cm
D. 18.0 cm
Answer: B
Conceptual Explanation: Fz is 30% of the distance from the Nasion (10% to Fp plus 20%
to Fz). 30% of 36 cm is 10.8 cm.
