Archives For October 2016

“Turn Offs”

October 13, 2016

What is sleep and why is it needed? In medical textbooks, sleep is generally defined as “a reversible behavioral state of perceptual disengagement from, and unresponsiveness to, the environment.” A state entered into by all animals, all the way down to lizards (and perhaps beyond). But why? Although much has been associated with the consequences of sleep (good and bad) the jury is still out on the biological nature of its requirement. But its evolutionary persistence – coupled with even the lethality of extreme deprivation – help to underscore its importance.

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