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- W2989761708 abstract "Introduction: The American Medical Association (AMA) issued a resolution in 2012 stating that light at night constitutes environmental pollution because it violates the daily cycles, including the waking and sleeping cycles, and suppresses the secretion of melatonin from the pineal gland at night. Results of previous studies have shown that exposure to artificial light at night (ALAN) and mainly those emerging from SWL sources suppresses MLT-produced in the pineal gland. Computers, tablets, TVs, and smartphones screens emit SWL illumination. The aim of this study was to examine the effects of screen illumination on sleep, emotion, physiology and cognitive functioning. Methods: 15 healthy subjects were studied using repeated measurements model with two independent variables. Intensity: low level-80lux and high level-350lux. Second, wavelength: short-wavelength (SWL) 450nm, and long-wavelength (LWL) 620 nm. Each participant experienced the four experimental conditions. Subjects were asked to sit 60cm in front of a computer screen and perform the on-screen tasks between the hours 21:00 and 23:00 h. Sleep polysomnography recorded their quality and sleep structure. Body temperature measurements were taken before sleep and after awakening. In the morning we assessed subjective sleepiness using ESS questionnaire, emotional state with BSI questionnaire, and cognitive performance using CPT test. Results: SWL screen illumination prevented the normal decline in body temperature curve at night. SWL decreased total sleep time (TST), sleep efficiency, and deep sleep (SWS), increased sleep latency and light sleep. Subjects reported significant sleepiness and negative emotion after SWL illumination at night. In CPT test the subject made more errors in the SWL condition. Conclusions: SWL-ALAN illumination from computer screen at night disrupts: sleep structure and sleep efficiency, cognitive functioning, emotional state, subjective sleepiness, and normal body temperature curve." @default.
- W2989761708 created "2019-12-05" @default.
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- W2989761708 date "2016-08-17" @default.
- W2989761708 modified "2023-09-28" @default.
- W2989761708 title "The effects of screen illumination on: sleep efficiency and architecture, physiology, emotion and behavior- possible effect on human health" @default.
- W2989761708 doi "https://doi.org/10.1289/isee.2016.3994" @default.
- W2989761708 hasPublicationYear "2016" @default.
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