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Author (up) Wahl, S.; Engelhardt, M.; Schaupp, P.; Lappe, C.; Ivanov, I.V. url  doi
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  Title The inner clock – blue light sets the human rhythm Type Journal Article
  Year 2019 Publication Journal of Biophotonics Abbreviated Journal J Biophotonics  
  Volume in press Issue Pages  
  Keywords Human Health; blue light; circadian rhythm; melanopsin; melatonin; visible light  
  Abstract Visible light synchronizes the human biological clock in the suprachiasmatic nuclei of the hypothalamus to the solar 24-hour cycle. Short wavelengths, perceived as blue color, are the strongest synchronizing agent for the circadian system that keeps most biological and psychological rhythms internally synchronized. Circadian rhythm is important for optimum function of organisms and circadian sleep-wake disruptions or chronic misalignment often may lead to psychiatric and neurodegenerative illness. The beneficial effect on circadian synchronization, sleep quality, mood, and cognitive performance depends not only on the light spectral composition but also on the timing of exposure and its intensity. Exposure to blue light during the day is important to suppress melatonin secretion, the hormone that is produced by the pineal gland and plays crucial role in circadian rhythm entrainment. While the exposure to blue is important for keeping organism's wellbeing, alertness, and cognitive performance during the day, chronic exposure to low-intensity blue light directly before bed-time, may have serious implications on sleep quality, circadian phase and cycle durations. This rises inevitably the need for solutions to improve wellbeing, alertness and cognitive performance in today's modern society where exposure to blue light emitting devices is ever increasing. This article is protected by copyright. All rights reserved.  
  Address Carl Zeiss Vision International GmbH, Aalen, Germany  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1864-063X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:31433569 Approved no  
  Call Number GFZ @ kyba @ Serial 2655  
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