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NCI Dictionary of Cancer Terms


electroencephalogram  listen  (ee-LEK-troh-en-SEH-fuh-loh-gram)

  A recording of electrical activity in the brain. It is made by placing electrodes on the scalp (the skin covering the top of the head), and impulses are sent to a special machine. An EEG may be used to diagnose brain and sleep disorders. Also called EEG.