This volume presents up-to-date comprehensive reviews of neuroscience research and theory on the fundamental interactions between the D1 and D2 dopamine receptor subtypes at numerous levels of investigation-from molecular biology and neuroanatomy, through electrophysiology, to the psychopharmacology of multiple forms of behavior, putative clinical significance, and therapeutic potential. This volume seeks to stand as a reference source on the evolution of the concept of D1: D2 interactions, on their substrates and psychopharmacological roles and, in such a continually evolving field, to look to the future. The Neuroscience Perspectives series aims to provide an all-round view of a current topic of great interest in neuroscience from the biochemical, pharmacological, and physiological standpoints together with the potential therapeutic applications. * SPECIAL FEATURES: * This is the ninth in Neuroscience Perspectives. * A Volume in Neuroscience Perspectives following series aim of providing all-round view of a current topic of great interest in Neuroscience from the biochemical, pharmacological and physiological standpoints together with the potential therapeutic applications. * The brain dopamine receptor has been the subject of intense interest for the past ten years owing to its involvement in motor and psychotic conditions. It is the target for the development of potential new drugs for eg. Schizophrenia and Parkinsons Diseases. Two subtypes of receptor have been found (D1 and D2). This book, edited by a respected expert in the field, examines the history of the topic, biochemistry, molecular biology and mode of interaction of the subtypes, and the therapeutic potential of the scientific discoveries, in the format of Neuroscience Perspectives. An issue of Nature in October 1990 led with the reported discovery of a D3 receptor. The implications of this for future research will be discussed in the final chapter.