title: Effects of short duration morning bright light in healthy elderly. II: sleep and motor activity.
abstract: Subjective sleep feelings and motor activity were measured in seven healthy elderly subjects for 6 days. The subjects were exposed to bright light (6000 lux) for 30 min in the morning or instructed to sit in front of a desktop lighting device without light. The average level of motor activity during the night was significantly decreased in the bright light condition, compared with the controlled condition. However, daytime motor activity did not show significant differences between the two conditions. From these findings, even a short duration of morning bright light is effective in maintaining sleep without changing daytime activity.
authors.affiliation: Sapporo Hanazono Hospital, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kohsaka
authors.forename: N
authors.initials: N
authors.lastname: Fukuda
authors.forename: R
authors.initials: R
authors.lastname: Kobayashi
authors.forename: H
authors.initials: H
authors.lastname: Honma
authors.forename: S
authors.initials: S
authors.lastname: Sakakibara
authors.forename: E
authors.initials: E
authors.lastname: Koyama
authors.forename: O
authors.initials: O
authors.lastname: Nakano
authors.forename: H
authors.initials: H
authors.lastname: Matsubara
mesh_terms: D000204:Activity Cycles; D000368:Aged; D000375:Aging / Q000523:psychology*; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D010789:Phototherapy; D017286:Polysomnography; D012890:Sleep; D014851:Wakefulness