Electroencephalogram: A technique for studying the electrical currents within the brain. Electrodes are attached to the scalp. Wires attach these electrodes to a machine, which records the electrical impulses. The results are either printed out or displayed on a computer screen. Different patterns of electrical impulses can denote various forms of epilepsy. Abbreviated EEG.
Quick GuideDementia, Alzheimer's Disease, and Aging Brains
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Last Editorial Review: 3/19/2012