magnetoencephalography


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Related to magnetoencephalography: functional magnetic resonance imaging

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.

magnetoencephalography (MEG) (mag·nēˈ·tō·en·seˈ·f·läˑ·gr·fē),

n noninvasive method of measuring magnetic fields created by the electrical activity in the brain.
References in periodicals archive ?
Magnetoencephalography (MEG) has typically been used for epilepsy evaluations, but is emerging as a neurologic/radiologic tool.
NEW YORK -- Magnetoencephalography, a new imaging modality that provides a millisecond-by-millisecond picture of the brain in action, is providing new insights into the language abnormalities of schizophrenia, reported Karen Froud, Ph.
The only methods capable of online detection of the electrical currents in neuronal activity are electromagnetic methods such electroencephalography (EEG), event-related brain potentials (ERP), (4) and magnetoencephalography (MEG).
A new magnetoencephalography device may prove useful for evaluating fetal brain activity.
However, new noninvasive methods, including functional magnetic resonance imaging (fMR), PET and magnetoencephalography (MEG) are better able to link brain anatomy with physiological function.
Okada and Salenius (1998) employed magnetoencephalography to investigate neural activity during a spatial working memory task.
Table 1 Brain Imaging Techniques for Mapping Brain Function Technique Contrast Mechanism Functional MRI (fMRI) Blood deoxyhemogloblin levels Positron Emission Tomography (PET) -- Intracellular glucose FDG/O15 uptake/blood flow Electroencephalography (EEG) Electrical/magnetic signal Magnetoencephalography (MEG) during neuronal firing Functional MR spectroscopy (fMRSI) -- Lactate production and lactate clearance during glycolysis/ neuronal activation
The researchers used a technique called magnetoencephalography (MEG) to measure magnetic fields produced by the brain's electrical activity in six volunteers as they listened to brief sequences of chords.
Each human being is considered to be a magnet as evidenced by diagnostic tests such as magnetic resonance imaging (MRI) (Slater, 1995) or magnetoencephalography (MEG) (Cohen, 1972).
For good temporal resolution, we still depend upon electroencephalography (EEG) and the newer, closely related technique of magnetoencephalography (MEG).
The market offers a variety of brain monitoring devices (electroencephalograph, intracranial pressure monitors, Transcranial Doppler, magnetoencephalography, and cerebral oximeters ), which help in monitoring a range of functions, such as electrical and neural activity, pressure surrounding the brain, velocity of blood flow in veins and arteries in the brain in case of epilepsy, brain death, traumatic brain injury, etc.
ST) announced on Tuesday that its fully-owned subsidiary, Elekta Oyj, a leading provider of magnetoencephalography (MEG) technology, has entered a long-term strategic partnership with BESA GmbH.