EEG 210- Final Exam Review
Questions and Answers 100% Pass
True or False: It is the responsibility of the technologist, during the recording, to prove
or verify whether a waveform is artifact or not. - ✔✔True
A potentially misread artifact that mimics high amplitude frontal spikes is: - ✔✔EMG
from the muscles of the forehead
An orderly approach to EEG includes asking which of the following questions? - ✔✔-Is
extracerebral activity physiologic or non-physiologic
-Is Extracerebral Activity continuous or intermittent, focal or diffuse, intrensic or
extrinsic, environental or instrumental, and is the source resolvable or unresolvable?
-Is cerebral activity continuous or intermittent, epielptiform or nonepileptiform and
then either normal or abnormal?
-Is the activity cerebral or extracerebral?
-Is cerebral cctivity focal or generalized?
Katelyn Whitman, All Rights Reserved © 2025 1
,Wickets, SSS or BETS, RMTD or Rhythmic Mid-Temporal Theta Discharges of
Drowsiness), 14 & 6 Hz Positive Spikes, SREDA - ✔✔Normal variants that may cause
confusion in EEG recordings
Classification Quantification Localization - ✔✔Ways in which EEG can help clarify
diagnosis and treatment
30% - ✔✔Percentage of patients referred to epilepsy centers for refractory seizures who
are misdiagnosed
Quiet patient, controlled setting, and qualified EEG Technologist - ✔✔Optimal
recording environment
First recording 29-55% Second recording with use of sleep deprivation increases to 85%
- ✔✔How much does a second EEG increase the likelihood of recording an epileptic
abnormality?
True or False: When using scalp electrodes, a normal clinical EEG excludes subclinical
focal seizures. - ✔✔False
When using scalp electrodes, a normal clinical EEG excludes subclinical focal seizures. -
✔✔Video the patient during the recording if possible, and monitor any potential
artifacts such as EMG, Tremor, Head Movement, Respiration, Eye movements, Tongue
movements, or any artifact originating from the patient or the environment.
Katelyn Whitman, All Rights Reserved © 2025 2
,Doll's eyes: eyes move as head moves - Stimulus in: Optic Nerve (vision), Vestibulo-
cochlear (hearing and equilibrium), Spinal Accessory (trapezius, neck, swallow) -
✔✔Response out: oculomotor nerve (eyelid and eyeball movements), Abducens (lateral
eyeball movement)
Cerebral Angiography Cerebral Scintigraphy (Radionucleide Scan) Transcranial
Doppler Ultrasound CT Angiography (CTA) (controversial Somatosensory Evoked
Potentials (controversial) - ✔✔Ancillary tests
Pupil response: Stimulus in - Optic nerve (Vision) - ✔✔Response out: oculomotor nerve
(eyelid and eyeball movements)
Pain responses exam - ✔✔Evidence of brainstem function
Gag test Stimulus in: Vagus nerve (senses and control of digestive organs, taste, slows
heart rate) - ✔✔glossopharyngeal nerve (taste, senses carotic BP), hypoglossal nerve
(controls tongue movement)
Apnea Test: Absence of breathing drive Prerequisites: 1. Normotension 2.
Normothermia 3. Euvolemia 4. Eucapnia (PaCo2 35-45 mm Hg) 5. Absence of hypoxia
6. No prior evidence of Co2 retention (i.e. chronic obstructive pulmonary disease or
severe obesity) - ✔✔Abort the test if the patient becomes unstable (Hypoxic,
Hypotensive, or develops cardiac arrhythmias)
Katelyn Whitman, All Rights Reserved © 2025 3
, In an ICS/ECI recording, the interelectrode distances should be: - ✔✔at least greater
than or equal to 10 cm
True or False: When performing an ECS/ECI recording, there should be NO EEG
reactivity to INTENSE somatosensory, auditory and visual stimuli. - ✔✔True
Tapping each electrode in an ECI/ECS recording is done to: - ✔✔test the integrity of the
entire system
How many electrodes are needed to perform an ECS/ECI (evaluation for brain death)
EEG Study, to ensure that focal attenuation is not mistaken for electrocerebral
inactivity? - ✔✔the full set of International 10-20 System electrodes
True or False: When performing an ECS/ECI recording, additional monitoring
techniques should be employed when necessary, and every effort made to eliminate
and/or identify and document any sources of artifact such as IV drips, electric beds,
EKG, respiration and movement. Common artifacts can be monitored with EKG, EMG
and respiratory monitoring channels. - ✔✔True
Impedances in an ECI/ECS recording should range: - ✔✔less than 10K Ohms but more
than 100 Ohms
In an ECS/ECI recording the sensitivity should be: - ✔✔2µV/mm for at least 30
minutes of the recording
Katelyn Whitman, All Rights Reserved © 2025 4
Questions and Answers 100% Pass
True or False: It is the responsibility of the technologist, during the recording, to prove
or verify whether a waveform is artifact or not. - ✔✔True
A potentially misread artifact that mimics high amplitude frontal spikes is: - ✔✔EMG
from the muscles of the forehead
An orderly approach to EEG includes asking which of the following questions? - ✔✔-Is
extracerebral activity physiologic or non-physiologic
-Is Extracerebral Activity continuous or intermittent, focal or diffuse, intrensic or
extrinsic, environental or instrumental, and is the source resolvable or unresolvable?
-Is cerebral activity continuous or intermittent, epielptiform or nonepileptiform and
then either normal or abnormal?
-Is the activity cerebral or extracerebral?
-Is cerebral cctivity focal or generalized?
Katelyn Whitman, All Rights Reserved © 2025 1
,Wickets, SSS or BETS, RMTD or Rhythmic Mid-Temporal Theta Discharges of
Drowsiness), 14 & 6 Hz Positive Spikes, SREDA - ✔✔Normal variants that may cause
confusion in EEG recordings
Classification Quantification Localization - ✔✔Ways in which EEG can help clarify
diagnosis and treatment
30% - ✔✔Percentage of patients referred to epilepsy centers for refractory seizures who
are misdiagnosed
Quiet patient, controlled setting, and qualified EEG Technologist - ✔✔Optimal
recording environment
First recording 29-55% Second recording with use of sleep deprivation increases to 85%
- ✔✔How much does a second EEG increase the likelihood of recording an epileptic
abnormality?
True or False: When using scalp electrodes, a normal clinical EEG excludes subclinical
focal seizures. - ✔✔False
When using scalp electrodes, a normal clinical EEG excludes subclinical focal seizures. -
✔✔Video the patient during the recording if possible, and monitor any potential
artifacts such as EMG, Tremor, Head Movement, Respiration, Eye movements, Tongue
movements, or any artifact originating from the patient or the environment.
Katelyn Whitman, All Rights Reserved © 2025 2
,Doll's eyes: eyes move as head moves - Stimulus in: Optic Nerve (vision), Vestibulo-
cochlear (hearing and equilibrium), Spinal Accessory (trapezius, neck, swallow) -
✔✔Response out: oculomotor nerve (eyelid and eyeball movements), Abducens (lateral
eyeball movement)
Cerebral Angiography Cerebral Scintigraphy (Radionucleide Scan) Transcranial
Doppler Ultrasound CT Angiography (CTA) (controversial Somatosensory Evoked
Potentials (controversial) - ✔✔Ancillary tests
Pupil response: Stimulus in - Optic nerve (Vision) - ✔✔Response out: oculomotor nerve
(eyelid and eyeball movements)
Pain responses exam - ✔✔Evidence of brainstem function
Gag test Stimulus in: Vagus nerve (senses and control of digestive organs, taste, slows
heart rate) - ✔✔glossopharyngeal nerve (taste, senses carotic BP), hypoglossal nerve
(controls tongue movement)
Apnea Test: Absence of breathing drive Prerequisites: 1. Normotension 2.
Normothermia 3. Euvolemia 4. Eucapnia (PaCo2 35-45 mm Hg) 5. Absence of hypoxia
6. No prior evidence of Co2 retention (i.e. chronic obstructive pulmonary disease or
severe obesity) - ✔✔Abort the test if the patient becomes unstable (Hypoxic,
Hypotensive, or develops cardiac arrhythmias)
Katelyn Whitman, All Rights Reserved © 2025 3
, In an ICS/ECI recording, the interelectrode distances should be: - ✔✔at least greater
than or equal to 10 cm
True or False: When performing an ECS/ECI recording, there should be NO EEG
reactivity to INTENSE somatosensory, auditory and visual stimuli. - ✔✔True
Tapping each electrode in an ECI/ECS recording is done to: - ✔✔test the integrity of the
entire system
How many electrodes are needed to perform an ECS/ECI (evaluation for brain death)
EEG Study, to ensure that focal attenuation is not mistaken for electrocerebral
inactivity? - ✔✔the full set of International 10-20 System electrodes
True or False: When performing an ECS/ECI recording, additional monitoring
techniques should be employed when necessary, and every effort made to eliminate
and/or identify and document any sources of artifact such as IV drips, electric beds,
EKG, respiration and movement. Common artifacts can be monitored with EKG, EMG
and respiratory monitoring channels. - ✔✔True
Impedances in an ECI/ECS recording should range: - ✔✔less than 10K Ohms but more
than 100 Ohms
In an ECS/ECI recording the sensitivity should be: - ✔✔2µV/mm for at least 30
minutes of the recording
Katelyn Whitman, All Rights Reserved © 2025 4
