magnetoencephalography

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magnetoencephalography

 (MEG) [mag-ne″to-en-sef″ah-log´ra-fe]
a noninvasive diagnostic technique that directly measures the magnetic fields produced by electrical currents in the brain. A vaultlike device is necessary to ensure that the accuracy of the test is not affected by interference from magnetic fields produced by electrical wires and radio and television transmissions.

mag·ne·to·en·ceph·a·log·ra·phy

(mag-nē'tō-en-sef'ă-log'ră-fē),
The process of recording the brain's magnetic field.

magnetoencephalography

(măg-nē′tō-ĕn-sĕf′ə-lŏg′rə-fē)
n. Abbr. MEG
A diagnostic imaging technique that detects and records magnetic fields produced by electrical activity in the brain.

mag·ne′to·en·ceph′a·lo·graph′ic (-ə-lə-grăf′ĭk, -ə-lō-) adj.

magnetoencephalography

The recording of the brain’s magnetic field using the obsolete magnetoencephalograph; it is identical topographically to the ionic field recorded by the electroencephalograph.

magnetoencephalography

Biomagnetism Neuroimaging An imaging technique used to evaluate subtle fluctuations in the electrical magnetic field produced by the body; MEG measures the brain's electrical activity by evaluating the magnetic field associated with neuronal activity. Cf Electroencephalography, PET scanning.
References in periodicals archive ?
Tiitinen, "Magnetoencephalographic (MEG) localization of the auditory N400m: effects of stimulus duration," NeuroReport, vol.
We studied both rest and stimulus-evoked magnetoencephalographic (MEG) activities in the sensorimotor cortex of a group of AD patients and a matched group of controls.
Electroencephalographic and magnetoencephalographic studies.
On the characterization of the spatio-temporal profiles of brain activity associated with face naming and the tip-of-the-tongue state: A magnetoencephalographic (MEG) study.
Using the MagnetoEncephaloGraphic (MEG) scanner at the York Neuroimaging Centre to test responses in the region, the researchers found that the posterior superior temporal sulcus responds so strongly to a face plus a voice that it clearly has a 'multimodal' rather than an exclusively visual function.
Kuroda, "Medial Prefrontal Cortex and Anterior Cingulate Cortex in the Generation of Alpha Activity Induced by Transcendental Meditation: A Magnetoencephalographic Study," Acta Medica Okayama 60, no.
Magnetoencephalographic studies of functional organization and plasticity of the human auditory cortex.
Magnetoencephalographic studies have also shown a dampening of the alpha activity within 200 ms after the appearance of a visual stimulus and also during visual imagery (Hari, Salmelin, Makela, Salenius & Helle, 1997).
It is very expensive, as are the customized cradles designed to accommodate a newborn's head and used to collect magnetoencephalographic data.
Magnetoencephalographic scans were performed 5 seconds after each move to measure focal gamma bursts in the 20- to 40-Hz range.
Instead, attempts to model the generating source of the frontal theta rhythm from both EEG (Gevins et al., 1997) and magnetoencephalographic (Ishii et al., 1999) data have implicated the anterior cingulate cortex as a likely region of origin.
Salmelin, Helenius, and Service (2000) have published a review of a series of magnetoencephalographic (MEG) experiments aimed at identifying cortical areas and time windows relevant to or even critical for fluent reading.