Published online by Cambridge University Press: 02 January 2018
The scientific study of sleep and its disorders is essentially just a few decades old, but during that time impressive advances have been made in the biological knowledge of sleep. There has been recognition and treatment of a wide range of sleep disorders from which many people in all sections of the population suffer. The common adverse consequences of persistent sleep disturbance (at personal, educational, social and occupational levels) for members of the public at large have become clear (Dement & Mitler, 1993), as have the special risks of such problems to which certain groups are exposed – notably people with chronic psychiatric or physical disorders or learning disabilities.
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