Mu Rhythm - CORRECT ANSWER -c3/c4 region
-7-11Hz
-does not block with eye opening
-easy to see with eyes open
-blocks unilaterally with contralateral hand
-asymmetrical and asynchronous
-NORMAL
Beta - CORRECT ANSWER ->14 HZ
-detected during wakefulness, enhanced during drowsiness, and de...
EEG board prep Exams Questions and
Answers (2023) (Verified Answers)
Mu Rhythm - CORRECT ANSWER -c3/c4 region
-7-11Hz
-does not block with eye opening
-easy to see with eyes open
-blocks unilaterally with contralateral hand
-asymmetrical and asynchronous
-NORMAL
Beta - CORRECT ANSWER ->14 HZ
-detected during wakefulness, enhanced during drowsiness, and decreased in deeper
sleep
-seen on barbiturates and benzodiazepines
Lambda waves - CORRECT ANSWER -NORMAL, awake
-sharp waves occurring in occipital region (o1/o2) during wakefulness
-visually scanning a picture in a lit room
-physiological, eyes OPEN
-saccadic eye movement
-4-6hz
Small sharp spikes / BETS - CORRECT ANSWER -occurs in stage 1/stage 2
-peaks at 30-60 years
-temporal region
-occurs sporadically and short duration
-NORMAL benign variant
Wicket Spikes - CORRECT ANSWER -Single spike or 6-11 hz Mu like shape seen in
drowsiness and light sleep.
-mid temporal region
-seen in adults over 30
-NORMAL benign variant
14&6hz positive spikes - CORRECT ANSWER -posterior/temporal region (t5/t6)
-normal benign variant
-light sleep
-best seen in referential montage
-runs last less than 2 seconds
-seen in a lot of adolescents
sleep spindles - CORRECT ANSWER -11-14hz , 1/2 second duration
-central regions
-asynchrony is abnormal after 2years old
-stage 2 sleep
Hypnagogic Hypersynchrony - CORRECT ANSWER -2-6years old
-central/frontal regions
-paroxysmal bursts high voltage, 3-4.5hz
-normal variant of drowsiness
Dilantin toxicity - CORRECT ANSWER ataxia (loss of control of body muscles)
Laplacian montage - CORRECT ANSWER -source reference deviation
-looks at only the electrodes that are closest to the point of interest
-emphasizes localized waveforms
deja vu - CORRECT ANSWER -complex partial sz
, -automatisms/impaired consciousness
extreme spindles - CORRECT ANSWER -found in MR (mental retardation) patients
-high voltage, anterior dominant
-generalized
OIRDA (Occipital Intermittent Rhythmic Delta Activity) - CORRECT ANSWER -
encephalopathy eeg pattern most associated with children
-high amplitude, saw toothed, and reactive to eye opening
Rolandic Spikes - CORRECT ANSWER -seen in children
-cento/temporal
-seen in benign rolandic epilepsy
FIRDA - CORRECT ANSWER -Frontal Intermittent Rhythmic Delta Activity
-reacts to stimulation
-2-3hz
-rhythmic
-awake adult eeg
Atonic seizure (drop attack) - CORRECT ANSWER generalized seizure characterized
by sudden loss of muscle tone and strength; may cause the head to drop suddenly,
objects to fall from the hands, or the legs to lose strength, with falling and potential injury
Tonic seizure - CORRECT ANSWER Muscle stiffness, rigidity
photomyogenic response - CORRECT ANSWER -normal physiological response to
photic light
-frontal leads
-only seen with eyes closed
Photoparoxysmal response - CORRECT ANSWER -abnormal response to photic
-spikes, polyspikes, or spike/waves
-mostly seen in FQ >10hz
HV contraindications - CORRECT ANSWER recent subarachnoid hemorrhage, recent
stroke, sickle cell disease, intracranial hemorrhage, old age, heart and/or breathing
problems
photic contraindications - CORRECT ANSWER subarachnoid hemorrhage, recent eye
surgery
tonic (tonic/clonic sz) - CORRECT ANSWER muscle artifact, generalized voltage
suppression
-stiffening/contracting of muscles
clonic (tonic/clonic sz) - CORRECT ANSWER rhythmic twitching or jerking of muscles
-spike and slow wave
Posterior Slow Waves of Youth - CORRECT ANSWER -8-14 years old
-accentuated by HV
-high voltage theta/delta
-occipital regions
SREDA (subclinical rhythmic electrographic discharges in adults) - CORRECT
ANSWER -suddenly in resting EEG
-periodic sharp activity that progresses into a monorhythmic theta pattern
-seen in mostly normal adults over 50
By age 1, what should the background rhythm be? - CORRECT ANSWER 5-6Hz
what pattern is seen after cardiac arrest? - CORRECT ANSWER alpha coma
EEG obtained during sleep are most important in what type of seizures? - CORRECT
ANSWER complex partial seizures
Sleep stages in tern newborn are characterized by: - CORRECT ANSWER onset
active sleep
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