An electroencephalogram (EEG) is a diagnostics test used to evaluate the electrical activity in a patient via small, metal discs (electrodes) attached to the scalp. Brain cells communicate through electrical impulses and are constantly active, even during sleep. An EEG tracks and records this activity.
EEG is crucial for diagnosing epilepsy, and plays a key role in diagnosing other brain disorders. EEG can help diagnose: