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.

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.

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References in periodicals archive ?

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.

Brain functioning as the ground for spiritual experiences and ethical behavior

Magnetoencephalographic studies of functional organization and plasticity of the human auditory cortex.

Perceptual training improves syllable identification in new and experienced hearing aid users

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).

Visual imagery without visual perception?

It is very expensive, as are the customized cradles designed to accommodate a newborn's head and used to collect magnetoencephalographic data.

Magnetomyography: a noninvasive measure of uterine contractions and fetal well-being

Magnetoencephalographic scans were performed 5 seconds after each move to measure focal gamma bursts in the 20- to 40-Hz range.

Scans Find Chess Masters Organize Data Differently. ('Chunking Theory' of Memory)

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.

FUNCTIONAL MAGNETIC RESONANCE IMAGING AND SPECTROSCOPIC IMAGING OF THE BRAIN: APPLICATION OF fMRI AND fMRS TO READING DISABILITIES AND EDUCATION

The addition of a magnetoencephalographic (MEG) scanner from Elekta, offering excellent performance in the temporal domain, will put the CBU in a highly competitive situation to meet the challenge of relating brain activity to normal and disordered cognitive function.

Elekta to Deliver Sophisticated 3-D Brain Mapping Technology to Leading UK Institution

Hari, "Removal of magnetoencephalographic artifacts with temporal signal-space separation: demonstration with single-trial auditory-evoked responses," Human Brain Mapping, vol.

Comparing the performance of popular MEG/EEG artifact correction methods in an evoked-response study

Graph theoretical analysis of magnetoencephalographic functional connectivity in Alzheimer's disease.

Frequency-specific Alterations of Large-scale Functional Brain Networks in Patients with Alzheimer's Disease