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EEG BOARD EXAM QUESTIONS AND ANSWERS 100% PASS
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EEG BOARD EXAM QUESTIONS AND ANSWERS 100% PASS SSS/BETS (small sharp waves / benign epileptiform transients of sleep) - Low voltage, short duration, diphasic spikes with a steep descending limb. Usually seen in drowsiness and light sleep. SREDA (subclinical rhythmic electrographic discharges of...

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  • January 9, 2025
  • 20
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • eeg board exam questions and answers 100 pass

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EEG BOARD EXAM QUESTIONS
AND ANSWERS 100% PASS

SSS/BETS (small sharp waves / benign epileptiform transients of sleep) - ✔✔Low voltage, short

duration, diphasic spikes with a steep descending limb. Usually seen in drowsiness and light sleep.


SREDA (subclinical rhythmic electrographic discharges of adults) - ✔✔Sharply contoured theta activity in

the posterior head region. A normal variant in older adults during wakefullness.


14 and 6 positive spikes - ✔✔1-2 seconds of sharply contoured discharges in the posterior head regions in

light sleep. Presents in adolescents.


6 hz spike and wave - ✔✔Midparietal low amplitude discharges. Occurs in young adults in drowsiness

and disappears in sleep.


My rhythm - ✔✔Oscillating 10 hz waves seen in leads overylying the senserimotor cortex in the absence

of movement. If a patient moves or thinks about moving their contralateral limb, this rhythm will be

suppressed.


Wickets - ✔✔Symmetric monophasic sharp wave occuring predominantly in older adults during light

sleep in temporal leads without disruption of the background.


3 hz slow wave activity - ✔✔3 hz waves without an associated spike which can be seen during

hyperventilation in childhood


RTTBD (rhythmic temporal theta bursts of drowsiness) - ✔✔5-6 hz rhythmic waves in the temporal lobe.

Seen in young adults during drowsiness.




Author. Emily Charlene, ©2025 All Rights Reserved.

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Breach rhythm - ✔✔Unilateral high voltage iregular wave rhythms due to alteration of conductance

commonly seen in patients with a skull defect.


Anterior eye blinks (bells phenomenon) - ✔✔Positive downward deflection, maximal in the frontopolar

leads, followed by a negative deflection from eye opening. Disappears in sleep.


EKG - ✔✔Rhythmic electropositive discharges in one or multiple leads, most often in the occipital leads.

Time locked and synchronous with the EKG tracing.


Pulse - ✔✔Rhythmic slow waves in a single lead due to a close pulsating vessel. Time locked but delayed

after each QRS sample.


Lateral eye movements - ✔✔Very slow out of phase derivations involving anterior electrodes due to

movement of the positively charged cornea. Best appreciated in drowsiness and early sleep when patient

experience rolling eye movements.


Muscle - ✔✔Extremely high frequency waves often generated from the frontalis and temporalis muscles.

Usually spares central leads. Disappears in sleep.


Glossokinetic - ✔✔Diffuse, low frequency discharges produced by movements of the negative tip of the

tongue. Can be induced by saying "la la la la", chewing, or sucking.


Electrode pop - ✔✔Single or multiple sharp waves localized to a single electrode without a surrounding

field. Disappears by reapplying an electrode.


GRDA (generalized rhythmic delta activity) - ✔✔Generalized in all leads, typically signifies global

cerebral dysfunction, such as in a severe encephalopathy, but is not to be a risk factor for seizure or

seizure tendency.


Frontally dominant GRDA - ✔✔Can be seen with a variety of pathologies including posterior fossa

lesions, intracranial lesions, and increased intraventricular pressure.




Author. Emily Charlene, ©2025 All Rights Reserved.

, 3|Page


LRDA (lateralized rhythmic delta) - ✔✔Can be seen with focal lesions such a hemorrhage, tumor, or

stroke. Is associated with increased seizure risk/seizure tendency.


LPDs (Lateralized periodic discharges) - ✔✔Often seen with focal acute or subacute cerebral dysfunction,

such as with herpes simplex enchephalitis, stroke, abscess, or subdural hematoma.


GPDs (Generalized periodic discharges) - ✔✔Felt to have highest seizure tendency of the 'ictal-interictal'

patterns. If seen clinically with rapidly progressive dementia it can be strongly suggestive of Creutzfeldt-

Jakob Disease.


End stage liver disease - ✔✔This disease can present with hyperammonemia and generalized periodic

waves with triphasic morphology. They are bilaterally synchronous and usually frontally predominant

and exhibit three phases (i.e. negative, positive, negative). Triphasic waves can also be seen in ESRD and

other forms of metabolic encephalopathy.


Subdural Hematoma - ✔✔Hemispheric asymmetry with the lower amplitude discharges localizing to the

affected hemisphere.


HSV Encephalitis - ✔✔Due to the predilection for the temporal lobes, patients will present with

lateralized periodic discharges (LPDs) most prominent in temporal leads.


Stroke - ✔✔Shows focal irregular theta/delta activity with LRDA or LPDs.


Creuztfeldt-Jakob Disease (CJD) - ✔✔Generalized periodic discharges, spikes, and spike-waves with a

disorganized background.


Fatal familial insomnia (FFI) - ✔✔Loss of sleep spindles.


Subacute sclerosing panencephalitis - ✔✔periodic high-amplitude complexes with high-amplitude

bisynchronous delta waves, frontal rhythmic delta activity, generalized periodic discharges,

electrodecremental periods following EEG complexes, and focal spike and slow-waves.




Author. Emily Charlene, ©2025 All Rights Reserved.

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