EEG Board Exam 2026/2027 – Actual Exam
Questions with Verified Correct Answers |
Fully Updated Study Guide
Question 1
According to the International 10-20 System, the nasion is located at:
A) The midpoint of the inion and the occipital protuberance
B) The junction of the frontal and parietal bones
C) The depression just above the bridge of the nose, between the eyes
D) The top of the ear
Answer: C - The nasion is the depression just above the bridge of the nose, between
the eyes, serving as the anterior reference point for measurements in the 10-20 system .
Question 2
In the International 10-20 System, the electrode at Cz is positioned at what percentage
of the total distance from nasion to inion?
A) 10%
B) 20%
C) 50%
D) 70%
Answer: C - Cz is positioned at the midpoint (50%) of the nasion-inion line, making it
the central vertex electrode .
Question 3
The International 10-20 System standard paper speed for routine adult EEG recordings
is:
A) 10 mm/sec
B) 20 mm/sec
,C) 30 mm/sec
D) 60 mm/sec
Answer: C - 30 mm/sec is the conventional horizontal scaling for adult EEG recordings .
Question 4
What is the maximum recommended electrode impedance for recording EEG?
A) 500 ohms
B) 1,000 ohms
C) 5,000 ohms
D) 50,000 ohms
Answer: C - The recommended electrode impedance is 5,000 ohms or less to minimize
electrode-related artifact .
Question 5
Which electrode material provides the most stable half-cell potential and is preferred for
routine clinical EEG?
A) Gold foil electrodes
B) Silver/silver-chloride (Ag/AgCl) electrodes
C) Platinum discs
D) Stainless-steel pins
Answer: B - Ag/AgCl electrodes have low polarization and stable potentials, yielding
low impedance recordings .
Question 6
Which skin preparation technique is most effective for reducing impedance on a dry
scalp?
A) Wiping with an alcohol swab only
B) Abrading lightly with a mild abrasive paste followed by conductive gel
,C) Applying a moisturizer
D) Using a dry cloth
Answer: B - Abrading lightly with a mild abrasive paste followed by conductive gel
creates a low-impedance interface; alcohol alone may dry the skin .
Question 7
The target impedance for scalp electrodes in a routine EEG is:
A) < 5 kΩ
B) < 50 kΩ
C) < 500 Ω
D) < 0.5 kΩ
Answer: A - Impedances below 5 kΩ help maintain signal quality and reduce noise .
Question 8
Which supplemental electrode is placed lateral to the outer canthus to monitor eye
movements?
A) Fp
B) T
C) EOG (horizontal)
D) Cz
Answer: C - Horizontal EOG electrodes are positioned near the outer canthi to capture
lateral eye movements .
Question 9
When measuring the distance from nasion to inion for a 20-year-old adult, the electrode
at Cz should be placed at:
A) 10% of the total distance from nasion
B) 20% of the total distance from nasion
, C) 50% of the total distance from nasion
D) 70% of the total distance from nasion
Answer: C - Cz is positioned at the midpoint (50%) of the nasion-inion line .
Question 10
What is the primary advantage of using collodion for electrode fixation?
A) Rapid application without drying time
B) Long-lasting adhesion that resists sweat and movement
C) Ability to be removed without any residue
D) Compatibility only with pediatric patients
Answer: B - Collodion forms a film that adheres well even with perspiration, making it
useful for long recordings .
Question 11
Which of the following is the most reliable method for verifying a patient's identity
before an EEG recording?
A) Asking the patient's name only
B) Checking a single wristband ID
C) Using two independent identifiers (e.g., name and medical record number)
D) Relying on the referring physician's note
Answer: C - The Joint Commission recommends two independent identifiers (e.g., full
name and MRN) to prevent misidentification .
Question 12
When obtaining a seizure history, which piece of information is MOST critical for
interpreting the EEG?
A) Patient's favorite color
B) Time of last meal
Questions with Verified Correct Answers |
Fully Updated Study Guide
Question 1
According to the International 10-20 System, the nasion is located at:
A) The midpoint of the inion and the occipital protuberance
B) The junction of the frontal and parietal bones
C) The depression just above the bridge of the nose, between the eyes
D) The top of the ear
Answer: C - The nasion is the depression just above the bridge of the nose, between
the eyes, serving as the anterior reference point for measurements in the 10-20 system .
Question 2
In the International 10-20 System, the electrode at Cz is positioned at what percentage
of the total distance from nasion to inion?
A) 10%
B) 20%
C) 50%
D) 70%
Answer: C - Cz is positioned at the midpoint (50%) of the nasion-inion line, making it
the central vertex electrode .
Question 3
The International 10-20 System standard paper speed for routine adult EEG recordings
is:
A) 10 mm/sec
B) 20 mm/sec
,C) 30 mm/sec
D) 60 mm/sec
Answer: C - 30 mm/sec is the conventional horizontal scaling for adult EEG recordings .
Question 4
What is the maximum recommended electrode impedance for recording EEG?
A) 500 ohms
B) 1,000 ohms
C) 5,000 ohms
D) 50,000 ohms
Answer: C - The recommended electrode impedance is 5,000 ohms or less to minimize
electrode-related artifact .
Question 5
Which electrode material provides the most stable half-cell potential and is preferred for
routine clinical EEG?
A) Gold foil electrodes
B) Silver/silver-chloride (Ag/AgCl) electrodes
C) Platinum discs
D) Stainless-steel pins
Answer: B - Ag/AgCl electrodes have low polarization and stable potentials, yielding
low impedance recordings .
Question 6
Which skin preparation technique is most effective for reducing impedance on a dry
scalp?
A) Wiping with an alcohol swab only
B) Abrading lightly with a mild abrasive paste followed by conductive gel
,C) Applying a moisturizer
D) Using a dry cloth
Answer: B - Abrading lightly with a mild abrasive paste followed by conductive gel
creates a low-impedance interface; alcohol alone may dry the skin .
Question 7
The target impedance for scalp electrodes in a routine EEG is:
A) < 5 kΩ
B) < 50 kΩ
C) < 500 Ω
D) < 0.5 kΩ
Answer: A - Impedances below 5 kΩ help maintain signal quality and reduce noise .
Question 8
Which supplemental electrode is placed lateral to the outer canthus to monitor eye
movements?
A) Fp
B) T
C) EOG (horizontal)
D) Cz
Answer: C - Horizontal EOG electrodes are positioned near the outer canthi to capture
lateral eye movements .
Question 9
When measuring the distance from nasion to inion for a 20-year-old adult, the electrode
at Cz should be placed at:
A) 10% of the total distance from nasion
B) 20% of the total distance from nasion
, C) 50% of the total distance from nasion
D) 70% of the total distance from nasion
Answer: C - Cz is positioned at the midpoint (50%) of the nasion-inion line .
Question 10
What is the primary advantage of using collodion for electrode fixation?
A) Rapid application without drying time
B) Long-lasting adhesion that resists sweat and movement
C) Ability to be removed without any residue
D) Compatibility only with pediatric patients
Answer: B - Collodion forms a film that adheres well even with perspiration, making it
useful for long recordings .
Question 11
Which of the following is the most reliable method for verifying a patient's identity
before an EEG recording?
A) Asking the patient's name only
B) Checking a single wristband ID
C) Using two independent identifiers (e.g., name and medical record number)
D) Relying on the referring physician's note
Answer: C - The Joint Commission recommends two independent identifiers (e.g., full
name and MRN) to prevent misidentification .
Question 12
When obtaining a seizure history, which piece of information is MOST critical for
interpreting the EEG?
A) Patient's favorite color
B) Time of last meal
