title: Awareness of time during sleep.
abstract: One cognitive ability that has been demonstrated in many people when asleep is the capacity to keep track of time sufficiently so that they can self-awaken when desired. Possible practical, physiological and evolutionary sources of this skill are outlined. Such findings help to establish the likely presence of significant cognitive ability when asleep.
authors.forename: W H
authors.initials: WH
authors.lastname: Moorcroft
authors.forename: J L
authors.initials: JL
authors.lastname: Breitenstein
mesh_terms: D001143:Arousal / Q000502:physiology; D001364:Awareness / Q000502:physiology*; D003071:Cognition / Q000502:physiology; D006801:Humans; D012890:Sleep / Q000502:physiology*; D012895:Sleep, REM / Q000502:physiology; D013998:Time Perception / Q000502:physiology*