Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Magneto-encephalogram artifacts caused by electro-encephalogram electrodes.

R Murdick1, B J Roth

  • 1Department of Physics, Oakland University, Rochester, Michigan, USA.

Medical & Biological Engineering & Computing
|April 15, 2003
PubMed
Summary

Simultaneous electro-encephalogram (EEG) and magneto-encephalogram (MEG) recordings can create artifacts. Eddy currents induced in EEG electrodes by MEG fields add magnetic noise, potentially reaching 3% in high-resolution measurements.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A simple plan: chemotherapy-sparing approaches to early-stage and regional seminoma and nonseminoma.

Annals of oncology : official journal of the European Society for Medical Oncology·2026
Same author

Comparative effectiveness of cisplatin-based and carboplatin-based chemotherapy for treatment of advanced urothelial carcinoma.

Annals of oncology : official journal of the European Society for Medical Oncology·2011
Same author

How epicardial electrodes influence the transmembrane potential during a strong shock.

Annals of biomedical engineering·2002
Same author

New currents in electrical stimulation of excitable tissues.

Annual review of biomedical engineering·2001
Same author

Sawtooth effect: fact or fancy?

Journal of cardiovascular electrophysiology·2001
Same author

The effect of plunge electrodes during electrical stimulation of cardiac tissue.

IEEE transactions on bio-medical engineering·2001

Area of Science:

  • Neuroscience
  • Biophysics
  • Biomedical Engineering

Background:

  • Simultaneous electro-encephalogram (EEG) and magneto-encephalogram (MEG) are advanced neuroimaging techniques.
  • Faraday's law of induction explains electromagnetic interactions between these modalities.
  • EEG electrodes can generate eddy currents due to changing MEG magnetic fields.

Purpose of the Study:

  • To quantify the artifact induced in MEG recordings by EEG electrodes.
  • To assess the impact of these artifacts under varying experimental conditions.

Main Methods:

  • Theoretical analysis based on Faraday's law of induction.
  • Modeling of eddy current generation in EEG electrodes.
  • Estimation of artifact magnitude under different measurement parameters.

Related Experiment Videos

Main Results:

  • Eddy currents in EEG electrodes create magnetic artifacts in MEG data.
  • Under typical conditions, the artifact magnitude is less than 1%.
  • Artifacts can increase to approximately 3% during high temporal frequency and high spatial resolution measurements.

Conclusions:

  • The interaction between EEG and MEG introduces a measurable artifact in MEG recordings.
  • This artifact is generally small but can be significant in demanding neuroimaging scenarios.
  • Understanding and mitigating this artifact is crucial for accurate interpretation of simultaneous EEG-MEG data.