A recording or visual representation of brain electrical activity or brain imaging, such as from an EEG or other brain scan.
From Greek enkephalos (brain) + -gram (recording, written record), a term for any recorded image of brain structure or function.
Encephalograms helped revolutionize neurology—the first EEG encephalogram in 1929 literally let doctors 'see' brain waves for the first time, opening the door to understanding epilepsy and sleep.
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