ABRET EEG R. EEG T. Exam Study Guide (2025-2026) | Verified Board Prep Q&A &
Waveform Analysis
Ace your neurodiagnostic boards with this comprehensive ABRET EEG study guide,
fully updated with verified questions and expert rationales for the 2026 exam cycle. This
review masters high-yield technical domains, including the 10-20 electrode placement
system, differential amplifier instrumentation, and ACNS clinical recording standards.
Designed for technologists aiming for R. EEG T. certification, it provides the critical
knowledge needed to identify complex seizure patterns, metabolic waveforms, and
essential patient safety protocols.
1. According to the International 10-20 System, what percentage of the total
distance is the measurement from Fp1 to F3?
A) 5%
B) 10%
C) 20%
D) 25%
Answer: B) 10%
Rationale: The distance between the prefrontal (Fp) and frontal (F) leads is 10% of the
total anteroposterior distance.
2. If the distance from the Nasion to the Inion is 36 cm, what is the measurement
from the Nasion to Fpz?
A) 1.8 cm
B) 3.6 cm
C) 7.2 cm
D) 10 cm
Answer: B) 3.6 cm
Rationale: Fpz is 10% of the total Nasion-Inion distance (
,).
3. What is the polarity of the cornea of the eye relative to the retina?
A) Positive
B) Negative
C) Neutral
D) Equipotential
Answer: A) Positive
Rationale: The eye acts as a dipole where the cornea is positive and the retina is
negative.
4. When an eye blinks, what direction do the eyes move?
A) Downward
B) Upward (Bell's Phenomenon)
C) To the left
D) To the right
Answer: B) Upward (Bell's Phenomenon)
Rationale: Bell’s Phenomenon is the reflex upward movement of the eyes during eyelid
closure.
5. In an EEG, an eye blink causes what type of artifact in the Fp1/Fp2 electrodes?
A) Downward deflection
B) Low-voltage fast activity
C) A positive-going (downward) wave
D) A negative-going (upward) wave
Answer: C) A positive-going (downward) wave
Rationale: As the positive cornea moves toward the prefrontal electrodes, the electrodes
pick up a positive charge, resulting in a downward deflection in most montages.
6. Which frequency band is defined as 4 Hz to less than 8 Hz?
A) Delta
B) Theta
C) Alpha
D) Beta
,Answer: B) Theta
7. "Mu Rhythm" is usually recorded from which electrodes?
A) O1 and O2
B) F3 and F4
C) C3 and C4
D) T3 and T4
Answer: C) C3 and C4
Rationale: The Mu rhythm is a central motor rhythm found over the sensorimotor cortex.
8. What is the standard time constant (TC) for a Low Frequency Filter of 1 Hz?
A) 0.03 sec
B) 0.16 sec
C) 0.3 sec
D) 1.0 sec
Answer: B) 0.16 sec
Rationale: Time Constant (TC) and LFF are inversely related.
.
9. If the HFF (High Frequency Filter) is lowered from 70 Hz to 15 Hz, what will
happen to a 20 Hz spike?
A) It will appear taller
B) It will appear sharper
C) It will be attenuated (decreased in amplitude)
D) It will be unaffected
, Answer: C) It will be attenuated (decreased in amplitude)
Rationale: A 15 Hz HFF attenuates frequencies above 15 Hz. A 20 Hz signal would be
significantly reduced.
10. What sensitivity is needed to make a
signal appear 10 mm tall?
A)
B)
C)
D)
Answer: C) 10 \mu\text{V/mm}
Rationale: Sensitivity = Voltage / Deflection.
.
Waveform Analysis
Ace your neurodiagnostic boards with this comprehensive ABRET EEG study guide,
fully updated with verified questions and expert rationales for the 2026 exam cycle. This
review masters high-yield technical domains, including the 10-20 electrode placement
system, differential amplifier instrumentation, and ACNS clinical recording standards.
Designed for technologists aiming for R. EEG T. certification, it provides the critical
knowledge needed to identify complex seizure patterns, metabolic waveforms, and
essential patient safety protocols.
1. According to the International 10-20 System, what percentage of the total
distance is the measurement from Fp1 to F3?
A) 5%
B) 10%
C) 20%
D) 25%
Answer: B) 10%
Rationale: The distance between the prefrontal (Fp) and frontal (F) leads is 10% of the
total anteroposterior distance.
2. If the distance from the Nasion to the Inion is 36 cm, what is the measurement
from the Nasion to Fpz?
A) 1.8 cm
B) 3.6 cm
C) 7.2 cm
D) 10 cm
Answer: B) 3.6 cm
Rationale: Fpz is 10% of the total Nasion-Inion distance (
,).
3. What is the polarity of the cornea of the eye relative to the retina?
A) Positive
B) Negative
C) Neutral
D) Equipotential
Answer: A) Positive
Rationale: The eye acts as a dipole where the cornea is positive and the retina is
negative.
4. When an eye blinks, what direction do the eyes move?
A) Downward
B) Upward (Bell's Phenomenon)
C) To the left
D) To the right
Answer: B) Upward (Bell's Phenomenon)
Rationale: Bell’s Phenomenon is the reflex upward movement of the eyes during eyelid
closure.
5. In an EEG, an eye blink causes what type of artifact in the Fp1/Fp2 electrodes?
A) Downward deflection
B) Low-voltage fast activity
C) A positive-going (downward) wave
D) A negative-going (upward) wave
Answer: C) A positive-going (downward) wave
Rationale: As the positive cornea moves toward the prefrontal electrodes, the electrodes
pick up a positive charge, resulting in a downward deflection in most montages.
6. Which frequency band is defined as 4 Hz to less than 8 Hz?
A) Delta
B) Theta
C) Alpha
D) Beta
,Answer: B) Theta
7. "Mu Rhythm" is usually recorded from which electrodes?
A) O1 and O2
B) F3 and F4
C) C3 and C4
D) T3 and T4
Answer: C) C3 and C4
Rationale: The Mu rhythm is a central motor rhythm found over the sensorimotor cortex.
8. What is the standard time constant (TC) for a Low Frequency Filter of 1 Hz?
A) 0.03 sec
B) 0.16 sec
C) 0.3 sec
D) 1.0 sec
Answer: B) 0.16 sec
Rationale: Time Constant (TC) and LFF are inversely related.
.
9. If the HFF (High Frequency Filter) is lowered from 70 Hz to 15 Hz, what will
happen to a 20 Hz spike?
A) It will appear taller
B) It will appear sharper
C) It will be attenuated (decreased in amplitude)
D) It will be unaffected
, Answer: C) It will be attenuated (decreased in amplitude)
Rationale: A 15 Hz HFF attenuates frequencies above 15 Hz. A 20 Hz signal would be
significantly reduced.
10. What sensitivity is needed to make a
signal appear 10 mm tall?
A)
B)
C)
D)
Answer: C) 10 \mu\text{V/mm}
Rationale: Sensitivity = Voltage / Deflection.
.
