Electroencephalography (EEG) is a test that records the electrical activity of the brain. Small sensors called electrodes are placed on the scalp to identify and measure the brain's electrical signals. These signals are then displayed on a computer screen or printed. EEG is commonly used to diagnose and monitor brain disorders, such as epilepsy, sleep disorders, and other conditions that affect brain function. The test does not involve any surgery or needles and helps doctors understand how the brain is working.

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