title: An activity monitor study on the sleep-wake rhythm of healthy aged people residing in their homes.
abstract: The aim of this preliminary study was to investigate sleep-wake rhythm in active, healthy elderly people residing in their usual habitat. The subjects were thirty-five male volunteers within an age range of 65-95 for 3-4 days. We measured the sleep-wake rhythm of the subjects with an Actillume which is a combined wrist activity monitor and illumination recorder. Analysis of the Actillume recording showed that 24 of the 35 subjects (69%) kept continuous activity indicating good maintenance of wakefulness with high light exposure. The mean mesor of sleep-wake rhythm, however, significantly decreased in the older subjects (aged 80-95; n=15).
authors.affiliation: Jikei University, Faculty of Medicine, School of Nursing, Tokyo, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Sakurai
authors.forename: M
authors.initials: M
authors.lastname: Sasaki
mesh_terms: D000204:Activity Cycles; D000368:Aged / Q000523:psychology*; D000369:Aged, 80 and over; D002940:Circadian Rhythm; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D017286:Polysomnography; D012890:Sleep; D012931:Social Environment; D014851:Wakefulness