The spontaneous ending of sleep.
The last hour of spontaneous awakenings from uninterrupted sleep of 16 young adults was analyzed. In general, sleep was not fitful and broken but a continuation of the sleep process to the point of awakening. There were substantial individual differences in the time of awakening and the stage of sleep from which the sleeper emerged.
D000328:Adult; D006801:Humans; D008297:Male; D012890:Sleep; D012894:Sleep Stages; D013997:Time Factors; D014851:Wakefulness