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Quizzes > Health & Medicine

EEG Quiz for Board Prep in Technical Sciences

Quick, free practice to sharpen skills-instant results with EEG exam questions.

Editorial: Review CompletedCreated By: Alanood AlabdullatifUpdated Aug 25, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
paper art illustration with stylized brain waveform EEG electrodes and quiz icons over coral background

This EEG quiz helps you practice electroencephalography technical sciences and see what to review before the exam. Work through questions on patterns, safety, artifacts, and 10-20 electrode placement. For related study, try our action potential quiz, build fundamentals with an electrical engineering quiz, or explore sleep-focused skills in an rpsgt practice exam.

Recommended maximum electrode-skin impedance for routine clinical EEG to optimize signal quality without excessive noise is closest to which value?
2 kOhm
5 kOhm (commonly targeted to keep noise low and matching impedances achievable)
20 kOhm
100 Ohm
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To faithfully record activity up to 70 Hz without aliasing, the minimum sampling rate that satisfies the Nyquist criterion is:
140 samples/s (at least twice the highest frequency)
100 samples/s
70 samples/s
120 samples/s
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What is the primary effect of raising the low-frequency (high-pass) filter from 0.3 Hz to 1.0 Hz in an EEG recording?
Enhances slow waves
Amplifies high-frequency muscle artifact
Attenuates slow (delta) activity and baseline drift (reduces slow components)
Introduces 60 Hz notch filtering
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Setting the high-frequency (low-pass) filter too low (e.g., 15 Hz) primarily causes which effect on EEG waveforms?
Improved EMG visualization
Attenuation of spikes and fast activity (smears sharp transients)
Increased slow drift
Enhancement of alpha rhythm
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In EEG, sensitivity is defined in uV/mm. What happens to displayed waveform size when sensitivity is increased from 7 uV/mm to 10 uV/mm?
No change in waveform size
Waveforms appear larger
Only fast activity changes size
Waveforms appear smaller for the same voltage (more uV per mm)
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Which statement best describes Common Mode Rejection Ratio (CMRR) in an EEG differential amplifier?
It is the ratio of input impedance to output impedance
It is the amplifier gain for differential signals divided by gain for common signals (higher is better)
It is the bandwidth of the amplifier
It is the ratio of signal to noise at the input
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When should a 50/60 Hz notch filter be used during EEG acquisition?
Always on, to prevent any interference
Never, it is unsafe
Only during sleep studies
Only when persistent line noise remains after optimizing impedances, cable routing, and grounding (as a last resort)
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With sensitivity at 7 uV/mm, a 50 uV calibration square wave should produce approximately what pen deflection?
3.5 mm
14 mm
7.1 mm (50 uV divided by 7 uV/mm)
10 mm
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What is the primary purpose of the patient ground electrode in EEG recording?
Determines amplifier gain
Serves as the electrical reference for all channels
Completes the patient circuit for safety and reduces common-mode interference
Conducts stimulation during photic testing
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Under the standard polarity convention, an upward deflection occurs when:
Both inputs are equal
Input 1 becomes more positive than Input 2
Input 1 becomes more negative than Input 2 (Input1 minus Input2)
Input 2 becomes more negative than Input 1
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Which situation is most consistent with a salt bridge artifact?
Two adjacent channels showing nearly identical waveforms due to electrolyte spread connecting electrodes
Flat lines in all channels
Slowly increasing amplitude over minutes
Random high-frequency bursts
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Under IEC 60601-1, what is the patient leakage current limit under normal operation for a Type CF applied part EEG system?
1 uA
10 uA (very low to enhance patient safety) (correct)
100 uA
1 mA
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What is a primary consequence of large impedance imbalance between the two inputs of a differential EEG channel?
Improved common-mode rejection
Higher sampling rate
No impact on noise
Increased artifact because common-mode signals convert to differential (reduced effective CMRR)
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The time constant (TC) of a single-pole high-pass filter relates to its cutoff frequency (fc) by which equation?
TC = 1 / fc
TC = 1 / (2π ⨉ fc)
TC = fc / 2π
TC = 2π ⨉ fc
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If the low-frequency filter is set at 0.3 Hz, the approximate time constant is:
0.17 s
0.05 s
3.3 s
0.53 s (TC = 1 / 2πf)
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Which best describes the effect of averaging (ensemble averaging) on repeated evoked responses embedded in noise?
Noise averages toward zero while time-locked signal sums coherently, improving SNR by about sqrt(N)
Only latency changes
Signal amplitude decreases faster than noise
Both signal and noise are eliminated
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High-frequency oscillations (HFOs) in epilepsy research typically occupy which band, requiring high sampling and bandwidth?
1-10 kHz
0.5-4 Hz
10-30 Hz
80-500 Hz (ripples and fast ripples)
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A well-designed EEG system anti-alias filter should be placed:
Only on the ground electrode
Only in software
After digitization
Before digitization, just below Nyquist, to attenuate frequencies above half the sampling rate
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In a Laplacian (source derivation) montage, each electrode is referenced to:
Cz only
Linked ears
The average of its immediate neighbors (spatially weighted reference)
A mastoid
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In simultaneous EEG-fMRI setups, which is the primary strategy to mitigate gradient artifact?
Lower sensitivity
Shorten electrode leads
Use 15 Hz low-pass filter
Template subtraction synchronized to MR gradients and ballistocardiogram
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Study Outcomes

  1. Analyze EEG waveforms -

    Interpret alpha, beta, delta, and theta rhythms to distinguish normal from pathological patterns in your eeg board prep practice.

  2. Apply standardized electrode placement -

    Demonstrate correct 10 - 20 system positioning to ensure accurate recordings during the EEG practice quiz.

  3. Identify common artifacts -

    Recognize and address muscle, movement, and external interference artifacts to improve signal quality for effective eeg exam prep.

  4. Interpret clinical case questions -

    Analyze sample scenarios from your neurotechnologist board review to sharpen critical thinking and problem-solving skills.

  5. Recall technical standards -

    Review regulatory guidelines and quality assurance criteria essential for electroencephalography practice questions and professional compliance.

  6. Enhance test-taking strategies -

    Practice time management and question analysis techniques to boost confidence and performance on the EEG board prep quiz.

Cheat Sheet

  1. Brainwave Frequency Bands -

    Review the five primary EEG rhythms - delta (0.5 - 4 Hz), theta (4 - 8 Hz), alpha (8 - 13 Hz), beta (13 - 30 Hz), and gamma (>30 Hz) - and their associated behavioral states. Use the mnemonic "Darn The Aardvark Bought Grapes" to recall the order from slowest to fastest. Recognizing these bands is essential for accurate EEG board prep and EEG exam prep.

  2. 10 - 20 Electrode Placement System -

    Memorize the international 10 - 20 electrode placement system, where distances between nasion, inion, and preauricular points are measured at 10% or 20% intervals to ensure standardized lead positions such as Fp1, F7, C3, or O2. Mastering this protocol ensures reliable recordings and is a cornerstone of electroencephalography practice questions. Visualizing head templates from ACNS or IFCN resources can speed up your recall during the exam.

  3. Montage Configurations -

    Compare montage configurations - referential (single reference), bipolar (adjacent electrodes), and Laplacian (localized derivatives) - to understand how each impacts signal amplitude and spatial resolution. Refer to ACNS guidelines to choose the optimal montage for focal versus generalized activity, a frequent focus in neurotechnologist board review. Practicing switching montages on sample datasets can solidify your decision-making skills.

  4. Filter Settings & Artifact Management -

    Fine-tune filter settings - commonly a 1 Hz high-pass to remove drift, a 70 Hz low-pass to exclude muscle noise, and a 50/60 Hz notch to reject line interference - following manufacturer specs or IFCN standards. Practice differentiating physiological artifacts (e.g., EOG, EMG) from true cerebral signals using video-EEG correlates, a skill often tested in EEG practice quizzes. Remember, improper filter use can mask or mimic pathology.

  5. Seizure Pattern Recognition -

    Identify hallmark seizure patterns such as the 3 Hz spike-and-wave complex in absence epilepsy or rhythmic temporal lobe spike bursts in focal seizures, and note their typical localization and spread. Use annotated waveform examples from journals like Epilepsia to reinforce pattern recognition and boost confidence in your eeg board prep success. Regularly timing waveform segments can help you gauge frequency and duration under exam conditions.

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