EEG Artifact Identification 4

Question 1

A rhythmic artifact at exactly 60 Hz appearing uniformly across all electrodes is most consistent with:

Accepted Answer

AC line noise

Answer

Muscle artifact

Answer

Electrode pop

Answer

Cardiac artifact

Question 2

Which artifact would most likely appear as a high-amplitude, low-frequency deflection time-locked to the R-wave on ECG?

Accepted Answer

Pulse artifact

Answer

Sweat artifact

Answer

Chewing artifact

Answer

Electrode pop

Question 3

A technologist notices intermittent square-wave transients isolated to a single electrode that disappear when the electrode impedance is rechecked and re-gelled. This is most consistent with:

Accepted Answer

Electrode pop

Answer

Muscle artifact

Answer

Sweat artifact

Answer

EKG artifact

Question 4

Slow, sinusoidal, high-amplitude waves that wax and wane over frontal electrodes in a drowsy, diaphoretic patient are most characteristic of:

Accepted Answer

Sweat artifact

Answer

Delta slowing

Answer

Eye movement artifact

Answer

Muscle artifact

Question 5

An artifact appearing as a rhythmic, 1–3 Hz broad, high-amplitude slow-wave pattern that correlates with the patient's assisted ventilation rate is called:

Accepted Answer

Ventilator artifact

Answer

Tremor artifact

Answer

Cardiac artifact

Answer

Movement artifact

Question 6

In a referential montage, an artifact that appears identical in amplitude and polarity on ALL channels simultaneously most likely originates from:

Accepted Answer

The reference electrode

Answer

A single scalp electrode

Answer

Muscle activity

Answer

Eye blinks

Question 7

High-frequency, irregular bursts of activity seen maximally over temporal and frontal electrodes during a patient interview are most consistent with:

Accepted Answer

Chewing/jaw muscle artifact

Answer

Temporal lobe seizure

Answer

Electrode noise

Answer

Cardiac artifact