An electrically-powered device designed for noninvasive recording of the electrical activity of the brain for display in the form of a graph [electroencephalogram (EEG)], typically to study a variety of neurological conditions, evaluate psychiatric disorders, and/or assist in localizing tumours or lesions on or near the surface of the brain. It is designed to acquire electrical signals from electrodes typically attached to the scalp and ear lobes. The results may be displayed via print-out or electronically; data interpretation and/or telemetry features may also be included.