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Electroencephalogram (EEG)

An electroencephalogram (EEG) works on the premise that information is processed in the brain as electrical activity in the form of action potentials or nerve impulses, transmitted along neurons. EEG scanners measure this electrical activity through electrodes attached to the scalp. Small electrical charges are detected by the electrodes, and are graphed over a period of time, indicating the level of activity in the brain.

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