"This monograph was stimulated by the extraordinary growth now apparent in an area, generally identified as sleep and dream research, for this recent concentration of scientific effort offers a singular example of the power that basic research can exert in penetrating the problems of mental health and illness. In the past year alone, the National Institute of Mental Health supported over 60 projects related in whole or in part to studies of sleep and dreams, with awards totaling over $2 million. The work of many of these NIMH investigators is included in this summary, which extends beyond the Institute's program insofar as necessary to indicate the major trends of work in the area. The report cannot, of course, encompass the classical studies already summarized in published literature, nor even provide comprehensive survey of present-day sleep research, for although much of the scientific data on sleep have been generated during the last dozen years, significant references in this field now number in the many thousands. The mosaic of disciplines contributing to the study of sleep contains such diverse fields as psychiatry, and mathematics, psychology, and biochemistry, physiology, and anthropology. Nevertheless, ferment about the subject matter and a spirit of cooperation across traditional disciplinary lines have made it possible to knit together data that might otherwise have lain unrelated in a variety of laboratories. During the past year, individual summaries of many of the projects cited here were distributed to scientists working in the field of sleep and dreams. Many of the recipients felt that up-to-date reports, especially in a field of such dynamic activity, represented a unique solution to the problem of scientific information exchange. Such communication, it was felt, provided a quick look at work in progress that might prevent duplication of effort and stimulate pertinent contacts among scientists, thus aiding them in their work. It is hoped that this monograph will be a further part of that process."--Foreword.