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  • Title: Bright-light treatment reduces actigraphic-measured daytime sleep in nursing home patients with dementia: a pilot study.
    Author: Fetveit A, Bjorvatn B.
    Journal: Am J Geriatr Psychiatry; 2005 May; 13(5):420-3. PubMed ID: 15879592.
    Abstract:
    OBJECTIVE: The authors evaluated the effects of bright-light therapy on daytime sleep among nursing home patients with dementia. METHODS: Eleven patients with sleep/wake disturbances received 2 hours/day of morning bright-light exposure for 2 weeks. Sleep was measured with actigraphy and nursing staff diaries. RESULTS: Daytime sleep decreased significantly in the period from rising time to 3:00 P.M. with bright-light treatment. Treatment effects did not last into the 16-week post-treatment period. CONCLUSIONS: Bright light exposure was effective in reducing daytime sleep in nursing home patients with dementia; this finding is possibly related to bright light's acute alerting effects.
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