magnetoencephalography

magnetoencephalography

▪ imaging technique
      imaging technique that measures the weak magnetic fields (magnetic field) emitted by neurons (neuron). An array of cylinder-shaped sensors monitors the magnetic field pattern near the patient's head to determine the position and strength of activity in various regions of the brain. In contrast with other imaging techniques, MEG can characterize rapidly changing patterns of neural activity—down to millisecond resolution—and can provide a quantitative measure of the strength of this activity in individual subjects. Moreover, by presenting stimuli at various rates, scientists can determine how long neural activation is sustained in the diverse brain areas that respond.

      A major advance in the field of diagnostic imaging was the realization of the combined use of information from functional magnetic resonance imaging (fMRI) and MEG. The former provides detailed information about the areas of brain activity in a particular task, whereas MEG tells researchers and physicians when certain areas become active. Together, this information leads to a much more precise understanding of how the brain works in health and disease.

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Universalium. 2010.

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  • Magnetoencephalography — Diagnostics Patient undergoing an MEG MeSH …   Wikipedia

  • magnetoencephalography — noun Date: 1968 a noninvasive technique that detects and records the magnetic field associated with electrical activity in the brain …   New Collegiate Dictionary

  • magnetoencephalography — noun a technique used to measure and analyze magnetic activity in the brain Syn: MEG See Also: magnetoencephalogram, electroencephalography, encephalography …   Wiktionary

  • magnetoencephalography — The process of recording the brain s magnetic field. * * * mag·ne·to·en·ceph·a·log·ra·phy in .sef ə läg rə fē n, pl phies a noninvasive technique that detects and records the magnetic field associated with electrical activity in the brain …   Medical dictionary

  • magnetoencephalography — magnēˈtoencephalogˈraphy noun The measuring of the weak magnetic signals produced by the brain • • • Main Entry: ↑magneto …   Useful english dictionary

  • magnetoencephalogram — magnetoencephalography /mag nee toh en sef euh log reuh fee/, n. /mag nee toh en sef euh leuh gram /, n. a record of the magnetic field of the brain. Abbr: MEG [MAGNETO + ENCEPHALOGRAM] * * * …   Universalium

  • magnetoencephalogram — magnetoencephalography /mag nee toh en sef euh log reuh fee/, n. /mag nee toh en sef euh leuh gram /, n. a record of the magnetic field of the brain. Abbr: MEG [MAGNETO + ENCEPHALOGRAM] …   Useful english dictionary

  • Neuroimaging — Para sagittal MRI of the head in a patient with benign familial macrocephaly. 3 D MRI o …   Wikipedia

  • N100 — In neuroscience, the N100 or N1 is a large, negative going evoked potential measured by electroencephalography (its equivalent in magnetoencephalography is the M100); it peaks in adults between 80 and 120 milliseconds after the onset of a… …   Wikipedia

  • Magnetenzephalogramm — Die Magnetoenzephalographie (von griechisch encephalon Gehirn, gráphein schreiben), abgekürzt MEG, ist eine Messung der magnetischen Aktivität des Gehirns, vorgenommen durch äußere Sensoren, die sogenannten SQUIDs. Dabei werden die Magnetfelder… …   Deutsch Wikipedia

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