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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?
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
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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.
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
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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
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 60-Hz filter is used, segments of EEG
should also be recorded without this filter for comparison. - ✔✔True
Author. Emily Charlene, ©2025 All Rights Reserved.
