sync fields chronobiology interdisciplinary field investigation interacts medical research fields sleep medicine endocrinology geriatrics sports medicine space medicine photoperiodism see also bacterial circadian rhythms biological clock aging circadian rhythm circannual cycle circaseptan day biological cycle familial sleep traits frank brown jr hitoshi okamura light effects circadian rhythm photoperiodism suprachiasmatic nucleus scotobiology time perception references reading hastings michael '' http bmjbmjjournalscom cgi content full brain circadian rhythms clock genes '' clinical review ''bmj'' december us congress office technology assessment '' http wwwprincetonedu ota disk pdf biological rhythms implications
Natural science Biology Chronobiology