摘要: The past three decades have witnessed impressive growth in relatively noninvasive techniques to probe the central nervous system. Computed tomography (CT) and magnetic residence imaging (MRI) provide anatomic information, whereas single proton emission computed tomography (SPECT) and positron emission tomography (PET) provide information about relative cerebral blood flow and metabolism, respectively. Electroencephalography (EEG) remains the only commonly available direct measure of cerebral neurophysiology and provides useful information about cerebral function. However, most physicians in rehabilitation settings rarely use EEGs except in the diagnosis of epilepsy. This chapter reviews basic technical and neurophysiologic aspects of both conventional EEG and the growing array of automated and computerized quantitative electroencephalographic (QEEG) technologies. Also discussed are potential prognostic and diagnostic uses specific to traumatic brain injury.