Seasonal Photoperiodic Responses of the Human Circadian System
Among the many external changes to which organisms must adapt is the special class of changes that predictably recur in association with daily and seasonal cycles in the environment. In the course of their evolution, most forms of life have taken advantage of the predictability of these changes by developing temporal programs that trigger adaptive responses to them in anticipation of their periodic recurrence.
KeywordsPlacebo Corn Depression Carbohydrate Cortisol
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