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Effects of short duration morning bright light in healthy elderly. II:Sleep and motor activity
Author(s) -
KOHSAKA MASAKO,
FUKUDA NORIKO,
KOBAYASHI RIKO,
HONMA HIROSHI,
SAKAKIBARA SATOSHI,
KOYAMA EMI,
NAKANO OSHIO,
MATSUBARA HOZUMI
Publication year - 1998
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1111/j.1440-1819.1998.tb01059.x
Subject(s) - morning , sleep (system call) , motor activity , audiology , duration (music) , psychology , medicine , physical medicine and rehabilitation , physics , computer science , acoustics , operating system
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.