Magnetoencephalography (MEG) is a technique for visualizing brain electrical activity by noninvasive recording of associated magnetic fields. MEG has been used to study so matosensory mapping of the human cortex, waves of thalamocortical activation during wakefulness and sleep, and the localization of seizure foci in epilepsy patients. MEG tech niques are still in development, and its use as a tool for real-time imaging of brain electrical activity will depend on advances in the underlying technology. The Neuroscientist 1:127- 129, 1995
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