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Chapter 12 - Common Artifacts

from Part II - Interpretation

Published online by Cambridge University Press:  24 June 2021

Neville M. Jadeja
Neville M. Jadeja
Affiliation:
University of Massachusetts Medical School
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Summary

Electrode artifacts may have a spiky, periodic or rhythmic appearance. Characteristically, it is limited to the involved electrode with no field. Sweat artifact may involve multiple channels and may be confused with lateral eye movements or GRDA. Eye movement and glossopharyngeal artifact may mimic frontally predominant GRDA. EKG artifact may be confused with periodic discharges. Characteristically, it corresponds to the QRS complexes. Ventilatory artifact may be confused with bursts of cerebral activity. Characteristically, it corresponds to the respiratory rate. Head tremor presents as occipital predominant rhythmic artifact. Maneuvers and devices such as bed-percussion, CRRT, ECMO, CPR and even brushing teeth may lead to ictal appearing rhythmic artifacts.Discharges associated with cortical myoclonus are best appreciated in the central channels as these are relatively free of muscle artifact. Chewing artifact may electrographically mimic a generalized tonic clonic seizure

Keywords

electrodesweateye movementglossopharyngealEKGventilatortremormyoclonuschewing
Type
Chapter
Information
How to Read an EEG , pp. 83 - 97
Publisher: Cambridge University Press
Print publication year: 2021

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References

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