Magnetoencephalography (MEG) is a noninvasive, functional imaging technique that measures the magnetic fields produced by electrical currents in the brain.
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...
References and Readings
- Ricker, J. H., Arenth, P. M., & Wagner, A. K. (2013). Functional neuroimaging. In N. D. Zasler, D. I. Katz, & R. D. Zafonte (Eds.), Brain injury medicine (pp. 225–226). New York: Demos.Google Scholar