Brain cells communicate with each other using electrical impulses. An electroencephalogram (EEG) is a test used to evaluate this electrical activity and detect brain-related problems, including:
To perform an EEG, a technologist will attach small, flat metal sensors (electrodes) your scalp with a sticky paste. The sensors are connected to a computer that records your brain’s electrical activity as wavy lines or patterns
During the test, you’ll lie on your back or sit in a chair with your eyes closed. The technologist may ask you to take deep and rapid breaths, look at a flashing light or even go to sleep. The procedure is safe and painless and usually takes about one to two hours.