magnetoencephalography
Pronunciation: mag-NEE-to-en-SEF-uh-LOG-rah-fee
Also written as: MEG — magnetoencephalography
Advanced neuroimaging technique that measures magnetic fields produced by electrical activity in the brain.
Full Definition
Magnetoencephalography (MEG) is a sophisticated, non-invasive neuroimaging technique that detects the weak magnetic fields generated by neural electrical activity. In pediatric neurology, MEG is particularly valuable for presurgical planning in children with refractory epilepsy, as it can precisely localize seizure foci and map critical brain functions like language and motor areas. The technique offers superior temporal resolution compared to other imaging methods and is especially useful when EEG findings are inconclusive. MEG requires specialized shielded rooms and superconducting sensors, making it available only at specialized pediatric epilepsy centers.
Usage
Usage note: Reserved for specialized pediatric epilepsy centers. Often used in conjunction with other imaging modalities for comprehensive presurgical evaluation.
In Context
- "MEG localization confirmed the seizure focus in the left temporal lobe prior to surgical resection." — Presurgical evaluation report
- "The MEG study revealed eloquent cortex overlap with the epileptogenic zone, complicating surgical planning." — Multidisciplinary team meeting notes