Uncensored EEG: The role of DC potentials in neurobiology of the brain

•DC potentials reflect changes in the level of excitation of the Brain.•DC potentials induce by physiological or pathological brain activities.•Several brain disorders produce abnormalities in physiological DC brain activity.•Pathological DC brain waves have been observed in several neurological disorders.•Monitoring of DC potentials may serve as diagnostic, prognostic, and treatment monitoring tools.