'Most paranormal experiences have negative affective themes with emphasis on some aspect of death to others or dissolution of the self. Experiences concerning death or crisis to others are reported to occur predominantly at night, particularly between 2:00 and 4:00 A.M. The sensed presence is also more common during this nocturnal period. We have suggested that the hourly incidence of temporal lobe seizures (data collected in the late nineteenth century by W. P. Spratling before medication was available) and the circadian distribution of sensed presences attributed to paranormal sources reflect a shared source of variance within the human brain.'
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'The Neuropsychiatry of Paranormal Experiences'
MICHAEL A. PERSINGER, PH.D., C.PSYCH