EEG BOARD EXAM COMPREHENSIVE
REVIEW QUESTIONS AND ANSWERS
100% VERIFIED. JUST RELEASED
1. A differential amplifier primarily functions by amplifying which of the following?
A. The difference between two input voltages
B. The sum of the voltages from two inputs
C. Only the voltage from the active electrode
D. The average of all input voltages
Answer: A
Conceptual Explanation: A differential amplifier amplifies the difference in voltage
between Input 1 and Input 2 while rejecting signals common to both inputs.
2. According to the polarity convention in EEG, if Input 1 is more negative than Input 2, the
deflection will be:
A. Downward
B. Upward
C. Equipotential
D. Horizontal
,Answer: B
Conceptual Explanation: The standard EEG polarity convention states that if Input 1 is
more negative than Input 2, the deflection is upward.
3. What is the relationship between the time constant (TC) and the low-frequency filter (LFF)?
A. Shorter TC corresponds to a lower LFF frequency
B. Longer TC corresponds to a lower LFF frequency
C. TC and LFF are unrelated
D. TC is double the LFF frequency
Answer: B
Conceptual Explanation: The time constant is inversely proportional to the frequency. A
longer time constant allows slower frequencies to pass, corresponding to a lower LFF
setting.
4. Which sampling rate is required by ACNS guidelines to prevent aliasing when using a 70 Hz
high-frequency filter?
A. 70 samples per second
B. 140 samples per second
C. 500 samples per second
D. 200 samples per second
Answer: D
, Conceptual Explanation: ACNS guidelines recommend a minimum sampling rate of 200
Hz for routine EEG to satisfy the Nyquist theorem and provide adequate resolution for a 70
Hz filter.
5. When measuring the 10-20 system, what percentage of the total nasion-to-inion distance is
Fz from the nasion?
A. 30%
B. 20%
C. 10%
D. 50%
Answer: A
Conceptual Explanation: From the nasion, Fp is 10%, and Fz is an additional 20% (total
30% from nasion) along the midline.
6. A 60 Hz notch filter should be used:
A. As a routine setting for all recordings
B. To increase the amplitude of the alpha rhythm
C. To improve the clarity of spike-and-wave discharges
D. Only when environmental noise cannot be reduced otherwise
Answer: D
REVIEW QUESTIONS AND ANSWERS
100% VERIFIED. JUST RELEASED
1. A differential amplifier primarily functions by amplifying which of the following?
A. The difference between two input voltages
B. The sum of the voltages from two inputs
C. Only the voltage from the active electrode
D. The average of all input voltages
Answer: A
Conceptual Explanation: A differential amplifier amplifies the difference in voltage
between Input 1 and Input 2 while rejecting signals common to both inputs.
2. According to the polarity convention in EEG, if Input 1 is more negative than Input 2, the
deflection will be:
A. Downward
B. Upward
C. Equipotential
D. Horizontal
,Answer: B
Conceptual Explanation: The standard EEG polarity convention states that if Input 1 is
more negative than Input 2, the deflection is upward.
3. What is the relationship between the time constant (TC) and the low-frequency filter (LFF)?
A. Shorter TC corresponds to a lower LFF frequency
B. Longer TC corresponds to a lower LFF frequency
C. TC and LFF are unrelated
D. TC is double the LFF frequency
Answer: B
Conceptual Explanation: The time constant is inversely proportional to the frequency. A
longer time constant allows slower frequencies to pass, corresponding to a lower LFF
setting.
4. Which sampling rate is required by ACNS guidelines to prevent aliasing when using a 70 Hz
high-frequency filter?
A. 70 samples per second
B. 140 samples per second
C. 500 samples per second
D. 200 samples per second
Answer: D
, Conceptual Explanation: ACNS guidelines recommend a minimum sampling rate of 200
Hz for routine EEG to satisfy the Nyquist theorem and provide adequate resolution for a 70
Hz filter.
5. When measuring the 10-20 system, what percentage of the total nasion-to-inion distance is
Fz from the nasion?
A. 30%
B. 20%
C. 10%
D. 50%
Answer: A
Conceptual Explanation: From the nasion, Fp is 10%, and Fz is an additional 20% (total
30% from nasion) along the midline.
6. A 60 Hz notch filter should be used:
A. As a routine setting for all recordings
B. To increase the amplitude of the alpha rhythm
C. To improve the clarity of spike-and-wave discharges
D. Only when environmental noise cannot be reduced otherwise
Answer: D
