Originally published in 1977, this volume attempts to show how the existing state of knowledge and technique in neuroscience can be effectively applied to a variety of practical clinical problems that at the time were dealt with less than adequately. Traditionally, clinical electroencephalography had been one of the major techniques by which our knowledge of neuroscience had been brought to bear upon these problems. The utility of this technique had been sharply limited and constrained by reliance upon qualitative interpretation of electrophysiological observations. In contrast, the approach proposed here is based upon quantitative measurements of salient features extracted from electrophysiological data which reflect various aspects of brain function related to sensory, perceptual and cognitive processes as well as to the structural and functional integrity of different neuroanatomical systems. The Editors call this quantitative approach "neurometrics".