Sleep-wake schedule disorder
Other Names: Inversion of sleep rhythm
Sleep phase disorder
Nature: The more common sleep phase disorder is delayed sleep phase, where sleep occurs later each day. In advanced sleep phase disorder, the tendency to sleep arrives earlier each day.
Incidence: Researchers in the USA have shown that in the absence of an alarm clock people will sleep longer by up to two hours.
Problem Type: G: Very specific problems
Date of last update 01.05.2000 – 00:00 CEST