EEG BOARD PRACTICE EXAM
QUESTIONS AND ANSWERS 100%
VERIFIED. JUST RELEASED
1. Which of the following describes the physiological basis of the EEG signal?
A. Action potentials from the axons of white matter tracts
B. Synchronized firing of astrocytes in the subcortical white matter
C. Direct current flow from the cerebral metabolic rate of oxygen consumption
D. Summated excitatory and inhibitory postsynaptic potentials from pyramidal cells
Answer: D
Conceptual Explanation: The EEG signal is primarily generated by the summation of
EPSPs and IPSPs occurring in the apical dendrites of pyramidal neurons in the cerebral
cortex.
2. According to the 10-20 system, what is the distance between Fp1 and F3?
A. 20% of the distance from Fp1 to O1
B. 10% of the distance from Fp1 to O1
C. 25% of the distance from Fp1 to O1
D. 50% of the distance from Fp1 to O1
,Answer: C
Conceptual Explanation: In the 10-20 system, the distance between Fp1 and F3 is 25% of
the total distance from the frontopolar (Fp1) to the occipital (O1) electrode along that
parasagittal plane.
3. If the input to Grid 1 is -50 microvolts and the input to Grid 2 is -20 microvolts, what will be
the resulting deflection?
A. 30 microvolt downward deflection
B. 30 microvolt upward deflection
C. 70 microvolt upward deflection
D. 70 microvolt downward deflection
Answer: B
Conceptual Explanation: EEG polarity convention states that if Grid 1 is more negative
than Grid 2, the deflection is upward. -50 - (-20) = -30 microvolts. A negative result
indicates Grid 1 is more negative, resulting in an upward deflection.
4. A 0.3 Hz Low Frequency Filter (LFF) corresponds to which time constant?
A. 0.53 seconds
B. 0.16 seconds
C. 1.0 seconds
D. 0.05 seconds
, Answer: A
Conceptual Explanation: The relationship is TC = 1 / (2 * pi * f). For 0.3 Hz, 1 / (2 * 3.14 *
0.3) is approximately 0.53 seconds.
5. What is the characteristic EEG finding in a patient with Subacute Sclerosing Panencephalitis
(SSPE)?
A. Periodic high-voltage complexes occurring every 4 to 15 seconds
B. Triphasic waves occurring at 1-2 Hz
C. Generalized 3 Hz spike-and-wave discharges
D. Continuous polymorphic delta activity
Answer: A
Conceptual Explanation: SSPE is characterized by high-voltage periodic complexes
(Radermecker complexes) that occur at long intervals, typically every 4 to 15 seconds.
6. Which filter would be most effective in reducing myogenic (muscle) artifact?
A. LFF 5 Hz
B. HFF 70 Hz
C. LFF 0.5 Hz
D. HFF 35 Hz
Answer: D
QUESTIONS AND ANSWERS 100%
VERIFIED. JUST RELEASED
1. Which of the following describes the physiological basis of the EEG signal?
A. Action potentials from the axons of white matter tracts
B. Synchronized firing of astrocytes in the subcortical white matter
C. Direct current flow from the cerebral metabolic rate of oxygen consumption
D. Summated excitatory and inhibitory postsynaptic potentials from pyramidal cells
Answer: D
Conceptual Explanation: The EEG signal is primarily generated by the summation of
EPSPs and IPSPs occurring in the apical dendrites of pyramidal neurons in the cerebral
cortex.
2. According to the 10-20 system, what is the distance between Fp1 and F3?
A. 20% of the distance from Fp1 to O1
B. 10% of the distance from Fp1 to O1
C. 25% of the distance from Fp1 to O1
D. 50% of the distance from Fp1 to O1
,Answer: C
Conceptual Explanation: In the 10-20 system, the distance between Fp1 and F3 is 25% of
the total distance from the frontopolar (Fp1) to the occipital (O1) electrode along that
parasagittal plane.
3. If the input to Grid 1 is -50 microvolts and the input to Grid 2 is -20 microvolts, what will be
the resulting deflection?
A. 30 microvolt downward deflection
B. 30 microvolt upward deflection
C. 70 microvolt upward deflection
D. 70 microvolt downward deflection
Answer: B
Conceptual Explanation: EEG polarity convention states that if Grid 1 is more negative
than Grid 2, the deflection is upward. -50 - (-20) = -30 microvolts. A negative result
indicates Grid 1 is more negative, resulting in an upward deflection.
4. A 0.3 Hz Low Frequency Filter (LFF) corresponds to which time constant?
A. 0.53 seconds
B. 0.16 seconds
C. 1.0 seconds
D. 0.05 seconds
, Answer: A
Conceptual Explanation: The relationship is TC = 1 / (2 * pi * f). For 0.3 Hz, 1 / (2 * 3.14 *
0.3) is approximately 0.53 seconds.
5. What is the characteristic EEG finding in a patient with Subacute Sclerosing Panencephalitis
(SSPE)?
A. Periodic high-voltage complexes occurring every 4 to 15 seconds
B. Triphasic waves occurring at 1-2 Hz
C. Generalized 3 Hz spike-and-wave discharges
D. Continuous polymorphic delta activity
Answer: A
Conceptual Explanation: SSPE is characterized by high-voltage periodic complexes
(Radermecker complexes) that occur at long intervals, typically every 4 to 15 seconds.
6. Which filter would be most effective in reducing myogenic (muscle) artifact?
A. LFF 5 Hz
B. HFF 70 Hz
C. LFF 0.5 Hz
D. HFF 35 Hz
Answer: D
