II-T. Waveform analysis and identification Flashcards
The EEG activity starting in the 2nd second of this epoch is most likely:
A) Photic driving response
B) Eye fluttering
C) Abrupt onset of a generalized tonic-clonic seizure
D) Facial twitching
Photic driving response
BENIGN EPILEPTIFORM TRANSIENTS OF SLEEP
A) stage IV sleep
B) common in infancy
C) midline occipital
D) peak at 30-60 years
peak at 30-60 years
It is coommon for FIRDA to:
A) be confused with nystagmus.
B) react to stimulation.
C) have spikes intermixed.
D) be considered normal in adults age 30-50
react to stimulation.
HYPSARRHYTHMIA
A) Continuous triphasic complexes
B) Disorganized, continuous high voltage slow waves with interspersed multifocal spike waves
C) High voltage diffuse 2-Hz spike wave discharges
D) Focal repetitive sharp wave activity
Disorganized, continuous high voltage slow waves with interspersed multifocal spike waves
SACCADIC EYE MOVEMENT
A) Mu
B) Midline Theta
C) Beta
D) Lambda
Lambda
BIPLEDS
A) Migraine
B) Hypothyroidism
C) Attention deficit
D) Hypoxia
Hypoxia
The EEG is unreactive to stimuli and is unchanging in appearance for entire recording. what EEG pattern is seen in this image?
A) Hypsarrhythmia with electrodecremental period
B) GPEDS (GPDS)
C) Burst Suppression
D) Postictal state
Burst suppression
What is happening in the first 2 seconds and the last 2 seconds in this sample?
A) 60 Hz artifact
B) The low filter was turned off
C) The high filter was turned off
D) Seizure activity
60 hz artifact
Which of the following best describes secondary bilateral synchrony?
A) Generates simultaneous generalized discharges
B) Reflects rapid generalization from one or multiple sources
C) Produces 3 Hz spike-and-wave discharges
D) Originates from both temporal lobes at the same time
Reflects rapid generalization from one or multiple sources
An EEG technologist observes what appears to be both Mu Rhythm and posterior dominant rhythm at the same time during the live EEG. What can they do to prove that the rhythm is Mu?
A) Ask the patient to move their hand that is ipsilateral to the suspected Mu Rhythm
B) Perform photic stimulation on the patient
C) Ask the patient to move their hand that is contralateral to the suspected Mu Rhythm
D) Perform Hyperventilation on the patient
Ask the patient to move their hand that is contralateral to the suspected Mu Rhythm
Which of the following patterns is characteristically eliminated by movement of a limb?
A) Lambda waves
B) Mu rhythm
C) Kappa rhythm
D) Positive occipital sharp transients
Mu rhythm
Mu Rhythm
A) 8-10 Hz
B) 12-14 Hz
C) 15-16 Hz
D) 2-6 Hz
8-10 Hz
Alpha Coma
A) 8-13 Hz activity occurring diffusely, maximum anteriorly
B) No recordable cerebral activity
C) Diffuse rhythmic 5 Hz activity, maximum anteriorly
D) Nonreactive activity, 0.5-4 Hz
8-13 Hz activity occurring diffusely, maximum anteriorly
SMALL SHARP SPIKES
A) Temporal Intermittent Rhythmic Delta Activity
B) Benign Epileptiform Transients of Sleep
C) Positive Occipital Sharp Transients of Sleep
D) Occipital Intermittent Rhythmic Delta Activity
Benign Epileptiform Transients of Sleep
Photoparoxysmal responses are characterized by:
A) EMG artifact time locked with the flash frequency
B) Asymmetric photic driving response
C) Generalized high amplitude beta with tiny time locked sharps
D) Generalized irregular spike and wave discharges or polyspike and wave bursts
Generlized irregular spike and wave discharges or polyspikes and wave bursts
Which of the following is characteristic of triphasic waves?
A) They are usually unilateral
B) They have a time lag from frontal to posterior head regions
C) They have a sharp initial positive phase
D) They are posterior dominant
They have a time lag from frontal to posterior head regions
Which of the following would be considered a focal abnormality?
A) Unilateral spikes
B) 3 hertz spike and wave
C) Burst suppression
D) Hypsarrhythmia
Unilateral spikes
The patient is a 25 year old male with a traumatic brain injury. What is seen in this sample?
A) Burst suppression
B) Artifact
C) Generalized tonic-clonic seizure
D) Complex partial seizure
Artifact
Which of the following EEG patterns is LEAST likely to be associated with clinical symptoms?
A) Frontal intermittent rhythmic delta activity
B) 6 Hz spike and wave
C) Generalized 3 Hz spike and wave
D) Generalized slow spike and wave of 1.5 to 2.5 Hz
6 Hz spike and wave
LAMBDA WAVES
A) Visual input
B) Thinking
C) Sleep
D) Muscle activity
Visual input
What is the most prominent feature of this EEG sample?
A) Stage 2 sleep
B) Focal seizure
C) Electrode pop
D) Lambda waves
Electrode pop
The activity in the red box would best be described as:
A) BETS
B) EMG
C) RTTD
D) EKG
EMG
Which is the most important when evaluating background frequency?
A) photic stimulation and stimulating frequencies
B) quality of sleep and hyperventilation effort
C) medications and allergies
D) wakefulness and age
wakefulness and age
Morphology, location and frequency are ways to describe
A) response to photo stimulation
B) EEG patterns and seizures
C) Clinical semiology
D) Filter settings
EEG patterns and seizures
What are the most significant finds in this sample?
A) Focal frontal spikes
B) Bi-frontal polyspike and wave
C) Eye blinks with bi-frontal polyspike and wave
D) Generalized spike and wave
Generalized spike and wave
Which scenario would be of more diagnostic value?
A) asymmetric amplitude
B) decreasing amplitude of alpha
C) presence of small sharp spikes (BETS)
D) asymmetric frequency
asymmetric frequency
Which of the following is considered abnormal?
A) Spikes
B) Wicket spikes
C) Small Sharp Spikes (SSS)
D) 6 Hz spike
Spikes
What differentiates Lambda and POSTS:
A) Occurs with eyes open
B) Polarity
C) Common in adults
D) Location
Occurs with eyes open
During neonatal seizures, the EEG is most likely to show:
A) Focal rhythmic activity
B) Low voltage fast activity
C) Generalized spike and wave discharges
D) Attenuation of EEG activity
Focal rhythmic activity
Subclinical Rhythmic Electrographic Discharge in Adults (SREDA) most often appears:
A) in those under age 50
B) unilaterally
C) during photic stimulation
D) suddenly in resting EEG
suddenly in resting EEG
