For some time, electroencephalography (EEG) has been employed clinically as a measure of brain function in the hope of determining and differentiating certain functional conditions of the brain. (medscape.com)
It is used in patients with cognitive dysfunction involving either a general decline of overall brain function or a localized or lateralized deficit. (medscape.com)
Clinical dementia is a fairly broad-based decline of brain function, and most definitions center on the patient's intellectual decline and memory dysfunction. (medscape.com)