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EEG Board Exam ACTUAL Exam 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS
EXAM QUESTIONS WILL COME FROM HERE (100%
Latest Already Graded A+
1. The standard international 10-20 system for electrode placement is
based on which of the following anatomical landmarks?
A) Nasion, inion, and preauricular points
B) Glabella, occipital protuberance, and mastoid processes
C) Vertex, temporal lobes, and frontal poles
D) Central sulcus and Sylvian fissure
Answer: A
Explanation: The 10-20 system uses the nasion (bridge of the nose),
inion (external occipital protuberance), and left and right preauricular
points as its foundational landmarks. These points allow for
proportional measurements of the skull, ensuring reproducible electrode
positions across individuals. The system derives its name from the fact
that electrode positions are placed at 10% or 20% intervals along the
measured contours. Glabella and mastoid processes are not primary
landmarks in this system, and while the vertex is an electrode location,
it is not a landmark for measurement.
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2. In EEG recording, the term "montage" refers to:
A) The number of electrodes used
B) The arrangement of channels and derivations
C) The filtering settings applied during recording
D) The impedance levels of the electrodes
Answer: B
Explanation: A montage is a specific arrangement of electrode pairs
used to display EEG activity across multiple channels. It defines how the
electrical potential differences are measured and visualized, such as in
bipolar or referential montages. The montage is not about electrode
count, filters, or impedance, although these factors interact with the
recording quality.
3. Which of the following EEG waveforms is most commonly associated
with deep sleep in adults?
A) Alpha rhythm
B) Beta rhythm
C) Delta rhythm
D) Mu rhythm
Answer: C
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Explanation: Delta rhythm consists of high-amplitude, low-frequency
(0.5–4 Hz) waves that are characteristic of slow-wave sleep (stages N3).
Alpha rhythm is associated with relaxed wakefulness, beta with
alertness or mental activity, and mu with sensorimotor cortex activity
during rest.
4. The primary role of the high-frequency filter in EEG recording is to:
A) Reduce slow artifact from sweating
B) Attenuate high-frequency signals such as muscle artifact
C) Enhance low-amplitude fast activity
D) Eliminate 60 Hz electrical interference
Answer: B
Explanation: The high-frequency filter, also known as the low-pass filter,
attenuates signals above a set cutoff frequency. This reduces unwanted
high-frequency noise, particularly electromyographic (muscle) artifact.
It does not address slow artifacts, which are managed by the low-
frequency filter, nor is it specifically designed for 60 Hz noise, which
requires a notch filter.
5. A patient presents with a 3 Hz spike-and-wave discharge on EEG. This
pattern is most consistent with:
A) Focal seizure disorder
B) Absence epilepsy
C) Lennox-Gastaut syndrome
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D) Juvenile myoclonic epilepsy
Answer: B
Explanation: Generalized 3 Hz spike-and-wave complexes are the
hallmark of childhood absence epilepsy. These discharges are bilaterally
synchronous and symmetric, often provoked by hyperventilation.
Lennox-Gastaut syndrome features slow spike-and-wave (<2.5 Hz),
juvenile myoclonic epilepsy shows fast generalized spike-wave (4–6 Hz),
and focal disorders present with localized discharges.
6. In EEG, the term "artifact" refers to:
A) A normal variant of brain activity
B) Electrical activity not of cerebral origin
C) A pathological discharge indicative of epilepsy
D) The calibration signal at the start of recording
Answer: B
Explanation: Artifacts are signals recorded by EEG that arise from non-
cerebral sources, such as muscle activity, eye movements, cardiac
activity, or environmental interference. They can obscure or mimic true
brain activity, and their recognition is critical for accurate
interpretation. Unlike normal variants or epileptiform discharges,
artifacts are external or physiological but not generated by cortical
neurons.
EEG Board Exam ACTUAL Exam 2026-2027 BANK
QUESTIONS WITH DETAILED VERIFIED ANSWERS
EXAM QUESTIONS WILL COME FROM HERE (100%
Latest Already Graded A+
1. The standard international 10-20 system for electrode placement is
based on which of the following anatomical landmarks?
A) Nasion, inion, and preauricular points
B) Glabella, occipital protuberance, and mastoid processes
C) Vertex, temporal lobes, and frontal poles
D) Central sulcus and Sylvian fissure
Answer: A
Explanation: The 10-20 system uses the nasion (bridge of the nose),
inion (external occipital protuberance), and left and right preauricular
points as its foundational landmarks. These points allow for
proportional measurements of the skull, ensuring reproducible electrode
positions across individuals. The system derives its name from the fact
that electrode positions are placed at 10% or 20% intervals along the
measured contours. Glabella and mastoid processes are not primary
landmarks in this system, and while the vertex is an electrode location,
it is not a landmark for measurement.
,2|Page
2. In EEG recording, the term "montage" refers to:
A) The number of electrodes used
B) The arrangement of channels and derivations
C) The filtering settings applied during recording
D) The impedance levels of the electrodes
Answer: B
Explanation: A montage is a specific arrangement of electrode pairs
used to display EEG activity across multiple channels. It defines how the
electrical potential differences are measured and visualized, such as in
bipolar or referential montages. The montage is not about electrode
count, filters, or impedance, although these factors interact with the
recording quality.
3. Which of the following EEG waveforms is most commonly associated
with deep sleep in adults?
A) Alpha rhythm
B) Beta rhythm
C) Delta rhythm
D) Mu rhythm
Answer: C
,3|Page
Explanation: Delta rhythm consists of high-amplitude, low-frequency
(0.5–4 Hz) waves that are characteristic of slow-wave sleep (stages N3).
Alpha rhythm is associated with relaxed wakefulness, beta with
alertness or mental activity, and mu with sensorimotor cortex activity
during rest.
4. The primary role of the high-frequency filter in EEG recording is to:
A) Reduce slow artifact from sweating
B) Attenuate high-frequency signals such as muscle artifact
C) Enhance low-amplitude fast activity
D) Eliminate 60 Hz electrical interference
Answer: B
Explanation: The high-frequency filter, also known as the low-pass filter,
attenuates signals above a set cutoff frequency. This reduces unwanted
high-frequency noise, particularly electromyographic (muscle) artifact.
It does not address slow artifacts, which are managed by the low-
frequency filter, nor is it specifically designed for 60 Hz noise, which
requires a notch filter.
5. A patient presents with a 3 Hz spike-and-wave discharge on EEG. This
pattern is most consistent with:
A) Focal seizure disorder
B) Absence epilepsy
C) Lennox-Gastaut syndrome
, 4|Page
D) Juvenile myoclonic epilepsy
Answer: B
Explanation: Generalized 3 Hz spike-and-wave complexes are the
hallmark of childhood absence epilepsy. These discharges are bilaterally
synchronous and symmetric, often provoked by hyperventilation.
Lennox-Gastaut syndrome features slow spike-and-wave (<2.5 Hz),
juvenile myoclonic epilepsy shows fast generalized spike-wave (4–6 Hz),
and focal disorders present with localized discharges.
6. In EEG, the term "artifact" refers to:
A) A normal variant of brain activity
B) Electrical activity not of cerebral origin
C) A pathological discharge indicative of epilepsy
D) The calibration signal at the start of recording
Answer: B
Explanation: Artifacts are signals recorded by EEG that arise from non-
cerebral sources, such as muscle activity, eye movements, cardiac
activity, or environmental interference. They can obscure or mimic true
brain activity, and their recognition is critical for accurate
interpretation. Unlike normal variants or epileptiform discharges,
artifacts are external or physiological but not generated by cortical
neurons.
