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Related Experiment Video

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Recording Brain Activity with Ear-Electroencephalography
09:58

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Published on: March 31, 2023

Artifact and recording concepts in EEG.

William O Tatum1, Barbara A Dworetzky, Donald L Schomer

  • 1Department of Neurology, Mayo Clinic Florida, Jacksonville, Florida 32224, USA. tatum.william@mayo.edu

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|June 3, 2011
PubMed
Summary

Electroencephalography (EEG) artifact, which includes non-brain electrical potentials, can obscure readings or mimic abnormalities. Accurate identification and elimination of these artifacts are crucial for correct EEG interpretation and patient care.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Clinical Electrophysiology

Background:

  • Artifacts are common in electroencephalography (EEG) recordings, arising from non-brain electrical potentials.
  • These artifacts can mimic genuine brain activity, leading to misinterpretations.
  • Distinguishing between true EEG signals and artifacts is essential for accurate diagnosis.

Purpose of the Study:

  • To highlight the challenges electroencephalographers face in identifying and interpreting EEG artifacts.
  • To emphasize the importance of artifact recognition for accurate patient diagnosis and treatment.
  • To discuss strategies for recording EEG data that minimizes artifactual interference.

Main Methods:

  • Review of common sources of physiologic and nonphysiologic artifacts in EEG.
  • Discussion of the principles for recognizing artifacts by identifying mismatches with realistic head models.
  • Exploration of recording concepts to aid in artifact interpretation.

Main Results:

  • Artifacts can significantly obscure EEG tracings or be mistaken for pathological findings.
  • Misinterpretation of artifacts can lead to incorrect diagnoses and adverse patient outcomes.
  • Despite digital EEG advancements, manual artifact identification remains critical.

Conclusions:

  • Effective artifact identification, recognition, and elimination are paramount for correct EEG interpretation.
  • Understanding artifact sources and applying sound recording principles improve diagnostic accuracy.
  • Proper management of EEG artifacts is vital for ensuring optimal patient care.