An electroencephalogram (EEG) is a painless test that detects electrical activity in your brain using small, flat metal discs (electrodes) attached to your scalp and connected by wires to a computer. Your brain cells communicate via electrical impulses and are active all the time, even when you're asleep. The computer records the electrical activity in your brain, which a neurologist will view to determine if there are any changes to the normal brain activity. This study is used to detect abnormalities.
Common indications for an EEG are: