EEG board prep Exam/180
Complete Q’s and A’s
Mu Rhythm - --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 - -->14 HZ
-detected during wakefulness, enhanced during drowsiness, and decreased
in deeper sleep
-seen on barbiturates and benzodiazepines
-Lambda waves - --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 - --occurs in stage 1/stage 2
-peaks at 30-60 years
-temporal region
-occurs sporadically and short duration
-NORMAL benign variant
-Wicket Spikes - --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 - --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 - --11-14hz , 1/2 second duration
-central regions
, -asynchrony is abnormal after 2years old
-stage 2 sleep
-Hypnagogic Hypersynchrony - --2-6years old
-central/frontal regions
-paroxysmal bursts high voltage, 3-4.5hz
-normal variant of drowsiness
-Dilantin toxicity - -ataxia (loss of control of body muscles)
-Laplacian montage - --source reference deviation
-looks at only the electrodes that are closest to the point of interest
-emphasizes localized waveforms
-deja vu - --complex partial sz
-automatisms/impaired consciousness
-extreme spindles - --found in MR (mental retardation) patients
-high voltage, anterior dominant
-generalized
-OIRDA (Occipital Intermittent Rhythmic Delta Activity) - --encephalopathy
eeg pattern most associated with children
-high amplitude, saw toothed, and reactive to eye opening
-Rolandic Spikes - --seen in children
-cento/temporal
-seen in benign rolandic epilepsy
-FIRDA - --Frontal Intermittent Rhythmic Delta Activity
-reacts to stimulation
-2-3hz
-rhythmic
-awake adult eeg
-Atonic seizure (drop attack) - -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 - -Muscle stiffness, rigidity
-photomyogenic response - --normal physiological response to photic light
-frontal leads
-only seen with eyes closed
Complete Q’s and A’s
Mu Rhythm - --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 - -->14 HZ
-detected during wakefulness, enhanced during drowsiness, and decreased
in deeper sleep
-seen on barbiturates and benzodiazepines
-Lambda waves - --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 - --occurs in stage 1/stage 2
-peaks at 30-60 years
-temporal region
-occurs sporadically and short duration
-NORMAL benign variant
-Wicket Spikes - --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 - --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 - --11-14hz , 1/2 second duration
-central regions
, -asynchrony is abnormal after 2years old
-stage 2 sleep
-Hypnagogic Hypersynchrony - --2-6years old
-central/frontal regions
-paroxysmal bursts high voltage, 3-4.5hz
-normal variant of drowsiness
-Dilantin toxicity - -ataxia (loss of control of body muscles)
-Laplacian montage - --source reference deviation
-looks at only the electrodes that are closest to the point of interest
-emphasizes localized waveforms
-deja vu - --complex partial sz
-automatisms/impaired consciousness
-extreme spindles - --found in MR (mental retardation) patients
-high voltage, anterior dominant
-generalized
-OIRDA (Occipital Intermittent Rhythmic Delta Activity) - --encephalopathy
eeg pattern most associated with children
-high amplitude, saw toothed, and reactive to eye opening
-Rolandic Spikes - --seen in children
-cento/temporal
-seen in benign rolandic epilepsy
-FIRDA - --Frontal Intermittent Rhythmic Delta Activity
-reacts to stimulation
-2-3hz
-rhythmic
-awake adult eeg
-Atonic seizure (drop attack) - -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 - -Muscle stiffness, rigidity
-photomyogenic response - --normal physiological response to photic light
-frontal leads
-only seen with eyes closed
