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Eur J Physiol ; Sleeping site selection by agile gibbons: Similarly, television and other forms of entertainment and communication may distract people from healthy sleep practices. Thus, little is known regarding the effects of seasonally variable day—night cycles on the sleep-wake patterns of nonindustrial indigenous populations [ 12 ]. Future research may find, for example, that a common environmental trigger influences disease in all these species. Influence of chronotype, season, and sex of subject on sleep behavior of young adults.

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Lithic Technology 31 2:

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David R. Samson, Ph.D.

Prevent Med ; Despite these strong links between sleep and health—and despite the pervasive changes in sleep in developed countries—few studies have considered the health implications of chronic sleep deprivation in a global health context [ 11 ]. Author information Article notes Copyright and License information Disclaimer. Am J Epidemiol ; The large evolutionary changes in sleep along the human lineage may be responsible for some sleep disorders that are seen in humans, although even some of the most striking disorders, such as narcolepsy, also occur in other animals [ ].

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