Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan

Magnetoencephalography

  • Flora M. HammondEmail author
  • Sheryl Katta-Charles
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_50

Synonyms

MEG

Definition

Magnetoencephalography (MEG) is a noninvasive, functional imaging technique that measures the magnetic fields produced by electrical currents in the brain.

Current Knowledge

Both MEG and electroencephalography (EEG) measure neuronal activity in real time on a millisecond time scale, making them useful for study of temporal properties of brain circuits. Skull and soft tissue interfere with magnetic currents less than electrical currents, providing MEG greater accuracy than electroencephalography (EEG). MEG may be particularly helpful in localizing areas of normal brain function, as well as brain dysfunction for clinical and research purposes. Information gained from MEG, which produces functional mapping, can be complementary to the structural findings obtained by magnetic resonance imaging (MRI) or computed tomography (CT) scan. Through a process referred to as magnetic source imaging (MSI), MEG may be combined with MRI to superimpose functional MEG data on...

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References and Readings

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physical Medicine and RehabilitationIndiana University School of MedicineIndianapolisUSA