Impact of daytime spectral tuning on cognitive function
Article
Article Title | Impact of daytime spectral tuning on cognitive function |
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ERA Journal ID | 2243 |
Article Category | Article |
Authors | Lok, Renske, Joyce, Daniel S. and Zeitzer, Jamie M. |
Journal Title | Journal of Photochemistry and Photobiology, B: Biology |
Journal Citation | 230 |
Article Number | 112439 |
Number of Pages | 9 |
Year | 2022 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 1011-1344 |
1873-2682 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jphotobiol.2022.112439 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1011134422000537 |
Abstract | Light at night can improve alertness and cognition. Exposure to daytime light, however, has yielded less conclusive results. In addition to direct effects, daytime light may also mitigate the impact of nocturnal light exposure on alertness. To examine the impact of daytime lighting on daytime cognitive performance, and evening alertness, we studied nine healthy individuals using a within subject crossover design. On four visits, participants were exposed to one of four lighting conditions for 10 h (dim fluorescent, room fluorescent, broad-spectrum LED, standard white LED; the latter three conditions were matched for 100 lx) followed by an exposure to bright evening light. Cognitive performance, subjective and objective measures of alertness were regularly obtained. While daytime alertness was not impacted by light exposure, the broad-spectrum LED light improved several aspects of daytime cognition. The impact of evening light on alertness was not mitigated by the pre-exposure to different daytime lighting conditions. Results suggest that daytime exposure to white light with high melanopic efficacy has the potential to improve daytime cognitive function and that such improvements are likely to be direct rather than a consequence of light-induced changes in alertness. |
Keywords | Light; Cognition; Sleep; Circadian; Human; Melanopsin; Alertness; Memory |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 520203. Cognitive neuroscience |
529999. Other psychology not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Stanford University, United States |
University of Nevada, United States | |
VA Palo Alto Health Care System, United States |
https://research.usq.edu.au/item/z8857/impact-of-daytime-spectral-tuning-on-cognitive-function
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