ABRET EXAM PREP QUESTIONS AND ANSWERS
Which is important to document to aid in interpretation?
a) low grade fever
b) uncooperative pt
c) pt was awake and alert during recording
d) HV was not performed due to asthma - Answers- c
What additional electrodes could help decipher b/w artifact and cortical activity?
a) respiration transducer
b) sphenoidal
c) EMG
d) EOG - Answers- d
What additional monitoring should be done in a middle age pt who repeatedly alerts
from sleep during EEG?
a) eye movement
b) movement
c) muscle tone
d) respiration - Answers- d
What type of monitoring would be useful in an EEG pt experiencing syncope?
a) movement transducer
b) respiration transducer
c) EOG
d) ECG - Answers- d
BRAIN ABCESS
a) burst suppression
b) ECI
c) focal polymorphic delta activity
d) diffuse slowing - Answers- c
Sphenoidal electrodes are used to record activity from the
a) brain stem
b) anterior temp lobes
c) basal ganglia
d) mesial frontal lobes - Answers- b
A slow wave focus is best seen w/
a) LF 0.3Hz, paper speed 60mm/sec
b) HF 70Hz, paper speed 60mm/sec
c) LF 5Hz, paper speed 15mm/sec
d) LF 0.3Hz, paper speed 15mm/sec - Answers- d
,The best reference electrode in an awake pt w/ excessive temporal myogenic activity
would be
a) ear lobes
b) mastoids
c) neck
d) Cz - Answers- d
14 & 6Hz positive spikes are best recorded w/
a) avg reference
b) contralateral ear reference
c) bipolar chain
d) both ears connected to reference - Answers- b
Which montage would best display the amp of a left temp spike?
a) left temp to ipsi ear
b) left temp to contra ear
c) ant-post bipolar temp chain
d) transverse (coronal) bipolar chain - Answers- b
BEST choice of reference to be used when recording in suspected temp lob epilepsy
a) A1+A2
b) ipsi ear
c) Cz
d) nasopharyngeals - Answers- c
Which settings will help enhance a low volt slow wave that's being masked by muscle
activity?
a) sens 2; LF 5; HF 35
b) sens 10; LF 1; HF 5
c) sens 5; LF 0.3; HF 35
d) sens 7; LF 1; HF 70 - Answers- c
Most appropriate setting change that should be made to enhance cortical slowing?
a) change LFF from 1Hz to 0.1Hz
b) change HFF from 70Hz to 15Hz
c) change LFF from 1Hz to 5Hz
d) change HFF from 70Hz to 25Hz - Answers- a
When using avg reference, if a spike-and-wave focus appears at C3, the abnormality
would be best enhanced by
a) using 35Hz filter and time constant of 0.03sec
b) decreasing sensitivty
c) excluding C3 and surrounding electrodes from reference
d) switching to Cz referential montage - Answers- c
,Which setting could be used to reduce the effects of sweat artifact in a pt w/
asymmetrical low-volt fast activity?
a) S=4mv/mm, LF=1Hz, HF=70Hz
b) S=5mv/mm, LF=5Hz, HF=70Hz
c) S=15mv/mm, LF=5Hz, HF=70Hz
d) S=10mv/mm, LF=0.3Hz, HF=35Hz - Answers- b
Laplacian montage
a) end of chain montage
b) fast fourier transform
c) avg reference
d) source reference derivation - Answers- d
When attempting to minimize relentless muscle artifact, the technologist should be
aware that lowing the HFF could cause artifact to resemble
a) 3Hz spike and wave
b) beta activity
c) polymorphic delta activity
d) vertex waves - Answers- b
Which montage would be best to localize occipital spikes by phase reversal?
a) circumferential bipolar
b) transverse bipolar
c) contralateral ear referential
d) common avg - Answers- a
Waveform of 0.5Hz can best be enhanced w/ a filter of
a) LF 0.3Hz
b) HF 35Hz
c) LF 5Hz
d) LF 1Hz - Answers- a
Referential recording is most appropriate for measuring
a) freq
b) phase
c) duration
d) volt - Answers- d
To enhance the background alpha and beta asymmetry in a recording showing
moderately high volt delta activity, the tech should use
a) shorter time constant and decreased sens
b) longer time constant and increased sens
c) longer time constant and decreased sens
d) shorter time constant and increased sens - Answers- d
Nyquist sampling rate for 100Hz waveforms
, a) 50 samples/sec
b) 25 samples/sec
c) >100 samples/sec
d) >200 samples/sec - Answers- d
Input impedance should be
a) equal to the common mode rejection ratio
b) less than the common mode rejection ratio
c) very low
d) very high - Answers- d
Which of the following is the most appropriate sampling rate used for a HFF setting of
70Hz?
a) 30 per sec
b) 210 per sec
c) 140 per sec
d) 10 per sec - Answers- b
Which of the following extra electrodes might best demonstrate the EEG activity
associated with focal motor twitching of the right corner of the mouth?
a) P5
b) FT9 (T1)
c) C1
d) C5 - Answers- d
An abbreviated 10-20 placement, respiration, ECG, and EOG
a) neonates
b) toddlers
c) ICU pts
d) Elderly pts - Answers- a
Cortical EEG recording can be obscured in pts who are tense and anxious due to
a) multifocal spikes
b) delta slowing
c) generalized spike wave
d) myogenic artifact - Answers- d
Minimal horizontal resolution
a) 16 bits
b) 16 Hz
c) 8 Hz
d) 8 bits - Answers- b
The way a signal is sampled at intervals and assigned a numeric value
a) aliasing
b) sampling rate
Which is important to document to aid in interpretation?
a) low grade fever
b) uncooperative pt
c) pt was awake and alert during recording
d) HV was not performed due to asthma - Answers- c
What additional electrodes could help decipher b/w artifact and cortical activity?
a) respiration transducer
b) sphenoidal
c) EMG
d) EOG - Answers- d
What additional monitoring should be done in a middle age pt who repeatedly alerts
from sleep during EEG?
a) eye movement
b) movement
c) muscle tone
d) respiration - Answers- d
What type of monitoring would be useful in an EEG pt experiencing syncope?
a) movement transducer
b) respiration transducer
c) EOG
d) ECG - Answers- d
BRAIN ABCESS
a) burst suppression
b) ECI
c) focal polymorphic delta activity
d) diffuse slowing - Answers- c
Sphenoidal electrodes are used to record activity from the
a) brain stem
b) anterior temp lobes
c) basal ganglia
d) mesial frontal lobes - Answers- b
A slow wave focus is best seen w/
a) LF 0.3Hz, paper speed 60mm/sec
b) HF 70Hz, paper speed 60mm/sec
c) LF 5Hz, paper speed 15mm/sec
d) LF 0.3Hz, paper speed 15mm/sec - Answers- d
,The best reference electrode in an awake pt w/ excessive temporal myogenic activity
would be
a) ear lobes
b) mastoids
c) neck
d) Cz - Answers- d
14 & 6Hz positive spikes are best recorded w/
a) avg reference
b) contralateral ear reference
c) bipolar chain
d) both ears connected to reference - Answers- b
Which montage would best display the amp of a left temp spike?
a) left temp to ipsi ear
b) left temp to contra ear
c) ant-post bipolar temp chain
d) transverse (coronal) bipolar chain - Answers- b
BEST choice of reference to be used when recording in suspected temp lob epilepsy
a) A1+A2
b) ipsi ear
c) Cz
d) nasopharyngeals - Answers- c
Which settings will help enhance a low volt slow wave that's being masked by muscle
activity?
a) sens 2; LF 5; HF 35
b) sens 10; LF 1; HF 5
c) sens 5; LF 0.3; HF 35
d) sens 7; LF 1; HF 70 - Answers- c
Most appropriate setting change that should be made to enhance cortical slowing?
a) change LFF from 1Hz to 0.1Hz
b) change HFF from 70Hz to 15Hz
c) change LFF from 1Hz to 5Hz
d) change HFF from 70Hz to 25Hz - Answers- a
When using avg reference, if a spike-and-wave focus appears at C3, the abnormality
would be best enhanced by
a) using 35Hz filter and time constant of 0.03sec
b) decreasing sensitivty
c) excluding C3 and surrounding electrodes from reference
d) switching to Cz referential montage - Answers- c
,Which setting could be used to reduce the effects of sweat artifact in a pt w/
asymmetrical low-volt fast activity?
a) S=4mv/mm, LF=1Hz, HF=70Hz
b) S=5mv/mm, LF=5Hz, HF=70Hz
c) S=15mv/mm, LF=5Hz, HF=70Hz
d) S=10mv/mm, LF=0.3Hz, HF=35Hz - Answers- b
Laplacian montage
a) end of chain montage
b) fast fourier transform
c) avg reference
d) source reference derivation - Answers- d
When attempting to minimize relentless muscle artifact, the technologist should be
aware that lowing the HFF could cause artifact to resemble
a) 3Hz spike and wave
b) beta activity
c) polymorphic delta activity
d) vertex waves - Answers- b
Which montage would be best to localize occipital spikes by phase reversal?
a) circumferential bipolar
b) transverse bipolar
c) contralateral ear referential
d) common avg - Answers- a
Waveform of 0.5Hz can best be enhanced w/ a filter of
a) LF 0.3Hz
b) HF 35Hz
c) LF 5Hz
d) LF 1Hz - Answers- a
Referential recording is most appropriate for measuring
a) freq
b) phase
c) duration
d) volt - Answers- d
To enhance the background alpha and beta asymmetry in a recording showing
moderately high volt delta activity, the tech should use
a) shorter time constant and decreased sens
b) longer time constant and increased sens
c) longer time constant and decreased sens
d) shorter time constant and increased sens - Answers- d
Nyquist sampling rate for 100Hz waveforms
, a) 50 samples/sec
b) 25 samples/sec
c) >100 samples/sec
d) >200 samples/sec - Answers- d
Input impedance should be
a) equal to the common mode rejection ratio
b) less than the common mode rejection ratio
c) very low
d) very high - Answers- d
Which of the following is the most appropriate sampling rate used for a HFF setting of
70Hz?
a) 30 per sec
b) 210 per sec
c) 140 per sec
d) 10 per sec - Answers- b
Which of the following extra electrodes might best demonstrate the EEG activity
associated with focal motor twitching of the right corner of the mouth?
a) P5
b) FT9 (T1)
c) C1
d) C5 - Answers- d
An abbreviated 10-20 placement, respiration, ECG, and EOG
a) neonates
b) toddlers
c) ICU pts
d) Elderly pts - Answers- a
Cortical EEG recording can be obscured in pts who are tense and anxious due to
a) multifocal spikes
b) delta slowing
c) generalized spike wave
d) myogenic artifact - Answers- d
Minimal horizontal resolution
a) 16 bits
b) 16 Hz
c) 8 Hz
d) 8 bits - Answers- b
The way a signal is sampled at intervals and assigned a numeric value
a) aliasing
b) sampling rate
