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Sleep improvement by light in a demented aged individual
Author(s) -
OKUMOTO YOSHIHIR.O,
KOYAMA EMI,
MATSUBARA HOZUMI,
NAKANO TOSHIO,
NAKAMURA REIZO
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.tb01026.x
Subject(s) - morning , sleep (system call) , sleep patterns , audiology , medicine , circadian rhythm , psychology , operating system , computer science
We administered daily morning bright light exposure in two separate periods to a demented aged subject in a nursing home and analyzed the sleep pattern changes from the sleep diary over 6 months. In the first light exposure period, the ratio of sleep time in night hours increased and maintained a higher value throughout the period than the previous baseline. After stopping the light exposure, the sleep pattern of the subject deteriorated. Resuming the light exposure reproduced similar sleep pattern changes. These results suggest that morning bright light exposure provides a better environment for aged persons to maintain a regular sleep‐wake pattern.