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EEG Board Exam 2025/2026 – Actual
Exam Questions with Verified Correct
Answers | Fully Updated Study Guide
Section 1: EEG Technical Sciences and Electrode Placement
Question 1
What is the primary physiological signal measured by an EEG?
A. Glucose metabolism rates
B. Electrical activity from cortical neurons
C. Magnetic fields produced by ion channels
D. Hemoglobin oxygenation changes
Correct Answer: B. Electrical activity from cortical neurons
Rationale: EEG records the summed electrical potentials generated by cortical neurons,
primarily pyramidal cells, through scalp electrodes. It does not measure magnetic fields (MEG),
blood oxygenation (fMRI), or glucose metabolism (PET).
Question 2
Which electrode placement system is most commonly used in clinical EEG?
A. 10–20 system
B. 12-lead system
C. International 94 system
D. 5–10 system
Correct Answer: A. 10–20 system
Rationale: The International 10–20 system is the standard for clinical EEG electrode
placement, ensuring reproducibility across recordings. The 12-lead system is used for ECG, and
the 5–10 system is a high-density variant less common in clinical practice.
Question 3
What is the normal frequency range of the alpha rhythm in adults?
A. 4–7 Hz
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B. 8–13 Hz
C. 14–30 Hz
D. 0.5–4 Hz
Correct Answer: B. 8–13 Hz
Rationale: The alpha rhythm, prominent in awake, relaxed adults with eyes closed, typically
falls between 8–13 Hz over occipital regions. Theta (4–7 Hz) and delta (0.5–4 Hz) are slower,
and beta (14–30 Hz) is faster.
Question 4
What is the minimum sampling rate required to accurately record a 70 Hz EEG signal, per the
Nyquist Theory?
A. 70 Hz
B. 100 Hz
C. 140 Hz
D. 200 Hz
Correct Answer: C. 140 Hz
Rationale: The Nyquist Theory states that the sampling rate must be at least twice the
highest frequency recorded. For a 70 Hz signal, the minimum sampling rate is 140 Hz to avoid
aliasing.
Question 5
Where should collodion and acetone be stored in an EEG lab?
A. Open shelf
B. Flammable cabinet
C. Refrigerator
D. General storage room
Correct Answer: B. Flammable cabinet
Rationale: Collodion and acetone are flammable substances requiring storage in a
designated flammable cabinet to meet OSHA safety standards.
Question 6
What are the two active ingredients in collodion used for EEG electrode application?
A. Ethanol and water
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B. Ethyl ether and ethanol
C. Acetone and saline
D. Glycerin and alcohol
Correct Answer: B. Ethyl ether and ethanol
Rationale: Collodion contains ethyl ether and ethanol, which provide adhesive properties for
securing EEG electrodes.
Question 7
What is the purpose of calibration in EEG recording?
A. To increase signal amplitude
B. To detect instrument faults and verify channel integrity
C. To reduce patient discomfort
D. To adjust electrode placement
Correct Answer: B. To detect instrument faults and verify channel integrity
Rationale: Calibration ensures EEG equipment functions correctly by comparing known
potentials and verifying that all channels amplify and filter uniformly.
Question 8
What causes over-dampening in an EEG recording, resulting in rounded waveforms?
A. High pen pressure
B. Low pen pressure
C. Incorrect filter settings
D. Faulty electrodes
Correct Answer: A. High pen pressure
Rationale: Over-dampening, caused by high pen pressure, slows the pen and produces
rounded waveforms, affecting signal clarity.
Question 9
What is the bit number for optimal resolution display in EEG systems?
A. 8 bits
B. 10 bits
C. 11 bits, preferably 12
D. 16 bits
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Correct Answer: C. 11 bits, preferably 12
Rationale: A resolution of 11–12 bits ensures sufficient detail for EEG signal display,
balancing data accuracy and storage requirements.
Question 10
Which filter settings create a very narrow band pass and should rarely be used clinically?
A. LF 1.0 Hz and HF 70 Hz
B. LF 5.0 Hz and HF 15 Hz
C. LF 0.5 Hz and HF 100 Hz
D. LF 2.0 Hz and HF 50 Hz
Correct Answer: B. LF 5.0 Hz and HF 15 Hz
Rationale: A low-frequency filter of 5.0 Hz and high-frequency filter of 15 Hz create a
narrow band pass, potentially missing critical EEG activity, and are rarely used clinically.
Section 2: EEG Patterns and Interpretation
Question 11
What activation procedure is useful for detecting absence seizures?
A. Photic stimulation
B. Hyperventilation
C. Sleep deprivation
D. Auditory stimulation
Correct Answer: B. Hyperventilation
Rationale: Hyperventilation can provoke absence seizures, characterized by 3 Hz spike-and-
wave discharges, making it a standard activation procedure.
Question 12
What activation is effective for detecting benign rolandic epilepsy?
A. Hyperventilation
B. Photic stimulation
C. Sleep activation
D. Tactile stimulation
Page 4 of 60
EEG Board Exam 2025/2026 – Actual
Exam Questions with Verified Correct
Answers | Fully Updated Study Guide
Section 1: EEG Technical Sciences and Electrode Placement
Question 1
What is the primary physiological signal measured by an EEG?
A. Glucose metabolism rates
B. Electrical activity from cortical neurons
C. Magnetic fields produced by ion channels
D. Hemoglobin oxygenation changes
Correct Answer: B. Electrical activity from cortical neurons
Rationale: EEG records the summed electrical potentials generated by cortical neurons,
primarily pyramidal cells, through scalp electrodes. It does not measure magnetic fields (MEG),
blood oxygenation (fMRI), or glucose metabolism (PET).
Question 2
Which electrode placement system is most commonly used in clinical EEG?
A. 10–20 system
B. 12-lead system
C. International 94 system
D. 5–10 system
Correct Answer: A. 10–20 system
Rationale: The International 10–20 system is the standard for clinical EEG electrode
placement, ensuring reproducibility across recordings. The 12-lead system is used for ECG, and
the 5–10 system is a high-density variant less common in clinical practice.
Question 3
What is the normal frequency range of the alpha rhythm in adults?
A. 4–7 Hz
Page 1 of 60
, 2
B. 8–13 Hz
C. 14–30 Hz
D. 0.5–4 Hz
Correct Answer: B. 8–13 Hz
Rationale: The alpha rhythm, prominent in awake, relaxed adults with eyes closed, typically
falls between 8–13 Hz over occipital regions. Theta (4–7 Hz) and delta (0.5–4 Hz) are slower,
and beta (14–30 Hz) is faster.
Question 4
What is the minimum sampling rate required to accurately record a 70 Hz EEG signal, per the
Nyquist Theory?
A. 70 Hz
B. 100 Hz
C. 140 Hz
D. 200 Hz
Correct Answer: C. 140 Hz
Rationale: The Nyquist Theory states that the sampling rate must be at least twice the
highest frequency recorded. For a 70 Hz signal, the minimum sampling rate is 140 Hz to avoid
aliasing.
Question 5
Where should collodion and acetone be stored in an EEG lab?
A. Open shelf
B. Flammable cabinet
C. Refrigerator
D. General storage room
Correct Answer: B. Flammable cabinet
Rationale: Collodion and acetone are flammable substances requiring storage in a
designated flammable cabinet to meet OSHA safety standards.
Question 6
What are the two active ingredients in collodion used for EEG electrode application?
A. Ethanol and water
Page 2 of 60
, 3
B. Ethyl ether and ethanol
C. Acetone and saline
D. Glycerin and alcohol
Correct Answer: B. Ethyl ether and ethanol
Rationale: Collodion contains ethyl ether and ethanol, which provide adhesive properties for
securing EEG electrodes.
Question 7
What is the purpose of calibration in EEG recording?
A. To increase signal amplitude
B. To detect instrument faults and verify channel integrity
C. To reduce patient discomfort
D. To adjust electrode placement
Correct Answer: B. To detect instrument faults and verify channel integrity
Rationale: Calibration ensures EEG equipment functions correctly by comparing known
potentials and verifying that all channels amplify and filter uniformly.
Question 8
What causes over-dampening in an EEG recording, resulting in rounded waveforms?
A. High pen pressure
B. Low pen pressure
C. Incorrect filter settings
D. Faulty electrodes
Correct Answer: A. High pen pressure
Rationale: Over-dampening, caused by high pen pressure, slows the pen and produces
rounded waveforms, affecting signal clarity.
Question 9
What is the bit number for optimal resolution display in EEG systems?
A. 8 bits
B. 10 bits
C. 11 bits, preferably 12
D. 16 bits
Page 3 of 60
, 4
Correct Answer: C. 11 bits, preferably 12
Rationale: A resolution of 11–12 bits ensures sufficient detail for EEG signal display,
balancing data accuracy and storage requirements.
Question 10
Which filter settings create a very narrow band pass and should rarely be used clinically?
A. LF 1.0 Hz and HF 70 Hz
B. LF 5.0 Hz and HF 15 Hz
C. LF 0.5 Hz and HF 100 Hz
D. LF 2.0 Hz and HF 50 Hz
Correct Answer: B. LF 5.0 Hz and HF 15 Hz
Rationale: A low-frequency filter of 5.0 Hz and high-frequency filter of 15 Hz create a
narrow band pass, potentially missing critical EEG activity, and are rarely used clinically.
Section 2: EEG Patterns and Interpretation
Question 11
What activation procedure is useful for detecting absence seizures?
A. Photic stimulation
B. Hyperventilation
C. Sleep deprivation
D. Auditory stimulation
Correct Answer: B. Hyperventilation
Rationale: Hyperventilation can provoke absence seizures, characterized by 3 Hz spike-and-
wave discharges, making it a standard activation procedure.
Question 12
What activation is effective for detecting benign rolandic epilepsy?
A. Hyperventilation
B. Photic stimulation
C. Sleep activation
D. Tactile stimulation
Page 4 of 60
