Electroencephalogram EEG

An EEG measures brain waves, or electrical activity in the brain. Electrodes placed on your scalp and possibly your face pick up brain waves and convert them to a visual signal, which can be displayed on a machine called an electroencephalograph. Older elec-troencephalography machines traced these visual signals on continuously moving paper; computers are now used to record, display, and assist in analyzing EEG data. An abnormal pattern of brain waves can help identify epilepsy, sleep disorders, neurotoxic states, and other brain disorders.

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