What is an Electroencephalogram (EEG) primarily used for?

An Electroencephalogram (EEG) is primarily used to provide an amplified recording of electrical activity in the brain. This technique involves placing electrodes on the scalp to measure the electrical impulses produced by neuronal activity. The resulting data reveals patterns of brain activity, often used in diagnosing conditions such as epilepsy, sleep disorders, and other neurological issues.

While it does allow for the visualization of brain activity (the choice that approximates correct use), the primary function is to detail the electrical patterns in a way that can be systematically recorded and analyzed. This focus on the amplification and recording of electrical signals distinguishes EEG from other imaging methods that may provide static images or assess metabolic activity through substances like radioactive glucose.