EEG 210- Final Exam Review Questions
With Solutions
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?
, EEG 210- Final Exam Review Questions
With Solutions
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.
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)
, EEG 210- Final Exam Review Questions
With Solutions
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)
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
, EEG 210- Final Exam Review Questions
With Solutions
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
True or False: According to ACNS Guidelines 6: Low frequency filter in ECS/ECI recordings
should not be set above 1 Hz to avoid eliminating slow potentials and the high frequency filter
should not be set below 30 Hz to avoid elimination of high frequency potentials. The 60-Hz
notch filter can be used with care, and only after appropriate troubleshooting is performed. If the
With Solutions
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?
, EEG 210- Final Exam Review Questions
With Solutions
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.
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)
, EEG 210- Final Exam Review Questions
With Solutions
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)
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
, EEG 210- Final Exam Review Questions
With Solutions
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
True or False: According to ACNS Guidelines 6: Low frequency filter in ECS/ECI recordings
should not be set above 1 Hz to avoid eliminating slow potentials and the high frequency filter
should not be set below 30 Hz to avoid elimination of high frequency potentials. The 60-Hz
notch filter can be used with care, and only after appropriate troubleshooting is performed. If the
