Circadian+Theory+of+Sleep

toc = Definition: = The theory that sleep evolved to keep humans out of harm's way during the night; also known as the evolutionary or adaptive theory. p113 Gen Psych Chapter 4, pp113

= Examples: = The circadian rhythm disorder known as irregular sleep-wake syndrome is an example of polyphasic sleep in humans. Polyphasic sleep is common in many animals, and is believed to be the ancestral sleep state. The term polyphasic// sleep // is also used by an online community that experiments with alternative sleeping schedules to achieve more time awake each day.

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