00000nam 2200000za 4500 9.807397 CaOODSP 20240219183356 cr ||||||||||| 150723s2014 oncd ob f000 0 eng d CaOODSP eng eng fre n-cn--- D68-2/108-2014E-PDF Circadian countermeasures in the high arctic during summer [electronic resource] / Michel A. Paul … [et al.]. [Ottawa] : Defence Research and Development Canada, 2014. viii, 36, [2] p. : fig., graphs, tables. Scientific report ; 2014-R108 November 2014. Includes bibliographical references (p. 33-34). The study described herein found that regulating outdoor travel and unnecessary exposure to bright nocturnal light can have a positive impact on the sleep quality of Arctic residents. Given the small benefit that melatonin treatment had on several of the research subjects, the prescription of exogenous melatonin may be appropriate for individuals suffering from circadian rhythm misalignment and associated sleep difficulties arising from exposure to nocturnal light that is provocative to the human circadian system. While the improvement in sleep quality from melatonin treatment fell short of statistical significance, it is probable that restricted access to outdoor evening light resulted in relatively normal sleep in our current subjects. This is in stark contrast to the sleep hygiene of the subjects evaluated in June 2012. Improving sleep quality and minimizing insomnia among the military residents of the Arctic will have a significant positive impact on the cognitive effectiveness of these individuals. gccst Military personnel gccst Health gccst Northern Canada Defence R&D Canada. Scientific report (Defence R&D Canada) 2014-R108 (CaOODSP)9.802305 PDF 1.75 MB https://publications.gc.ca/collections/collection_2015/rddc-drdc/D68-2-108-2014-eng.pdf DRDC-RDDC-2014-R108