Normal Variants Quiz
Authored by Alicia Weiske
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50 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the normal location of the Mu rhythm in the EEG?
Central or centro-parietal
Posterior
Frontocentral regions
Frontal vertex
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Identify this normal variant.
Mu
Lambda
Wickets
RMTD
SSS
Answer explanation
Mu Rhythm
* Arch-shaped, comb-like
* Frequency: 7-11 Hz
* Location: Central or Centro-parietal
* Level of Consciousness: wakefulness
* Reactivity: blocked by actual or imagined contralateral limb movement
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Identify this normal variant.
Mu
Lambda
Wickets
RMTD
SSS
Answer explanation
RMTD
"Rhythmic Mid-temporal Theta Drowsiness"
* Theta w/ flat-topped, sharply contoured, often notched
* Duration: 5-10 sec
* Location: mid- or anterior temporal
* Level of consciousness: drowsiness or relaxed. attenuates in deeper levels of sleep
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Identify this normal variant.
Mu
Lambda
Wickets
RMTD
SSS
Answer explanation
SSS
Small Sharp Spikes
* Sharp, often followed by small theta; single monophasic or biphasic spike or sharp
* Duration: brief, <50msec
* Location: temporal
* Level of consciousness: deep drowsiness, very light sleep
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Identify this normal variant.
Mu
Lambda
Wickets
RMTD
SSS
Answer explanation
SSS
Small Sharp Spikes
* Sharp, often followed by small theta; single monophasic or biphasic spike or sharp
* Duration: brief, <50msec
* Location: temporal
* Level of consciousness: deep drowsiness, very light sleep
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Identify this normal variant.
Mu
Lambda
Wickets
RMTD
SSS
Answer explanation
Mu Rhythm
* Arch-shaped, comb-like
* Frequency: 7-11 Hz
* Location: Central or Centro-parietal
* Level of Consciousness: wakefulness
* Reactivity: blocked by actual or imagined contralateral limb movement
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Identify this normal variant.
Mu
Lambda
Breach
RMTD
SSS
Answer explanation
Mu Rhythm
* Arch-shaped, comb-like
* Frequency: 7-11 Hz
* Location: Central or Centro-parietal
* Level of Consciousness: wakefulness
* Reactivity: blocked by actual or imagined contralateral limb movement
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