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    Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/120090


    Title: The Acute Effects of Intermittent Light Exposure in the Evening on Alertness and Subsequent Sleep Architecture
    Authors: Yang, Minqi;Ma, Ning;Zhu, Yingying;Su, Ying-Chu;Chen, Qingwei;Hsiao, Fan-Chi;Ji, Yanran;Yang, Chien-Ming;Zhou, Guofu
    楊建銘
    Yang, Chien-Ming
    Contributors: 心理系
    Keywords: acute effects;intermittent light;continuous light;dim light;alertness;sleep structure
    Date: 2018-03
    Issue Date: 2018-09-14 16:03:40 (UTC+8)
    Abstract: Exposure to bright light is typically intermittent in our daily life. However, the acute effects of intermittent light on alertness and sleep have seldom been explored. To investigate this issue, we employed within-subject design and compared the effects of three light conditions: intermittent bright light (30-min pulse of blue-enriched bright light (~1000 lux, ~6000 K) alternating with 30-min dim normal light (~5 lux, ~3600 K) three times); continuous bright light; and continuous dim light on subjective and objective alertness and subsequent sleep structure. Each light exposure was conducted during the three hours before bedtime. Fifteen healthy volunteers (20 ± 3.4 years; seven males) were scheduled to stay in the sleep laboratory for four separated nights (one for adaptation and the others for the light exposures) with a period of at least one week between nights. The results showed that when compared with dim light, both intermittent light and continuous bright light significantly increased subjective alertness and decreased sleep efficiency (SE) and total sleep time (TST). Intermittent light significantly increased objective alertness than dim light did during the second half of the light-exposure period. Our results suggested that intermittent light was as effective as continuous bright light in their acute effects in enhancing subjective and objective alertness and in negatively impacting subsequent sleep.
    Relation: International Journal of Environmental Research and Public Health , 2018 Mar, 15;15(3). pii: E524
    PMID: 29543731
    Data Type: article
    DOI link: https://doi.org/10.3390/ijerph15030524
    DOI: 10.3390/ijerph15030524
    Appears in Collections:[Department of Psychology] Periodical Articles

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