ABSTRACT
The process of awakening from sleep is not instantaneous. There is reason to believe that the transition to wakefulness is a gradual phenomenon, where the influence of the prior sleep stage may persist for an appreciable amount of time after awakening. These sleep-state aftereffects have been found for fantasy and dream reporting, for perception and memory, and possibly for some EEG measures. In some cases the carry-over effects appear to be stage-specific. This evidence will be summarized here.
