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Polyphasic sleep is the practice of sleeping during multiple periods over the course of 24 hours, in contrast to monophasic sleep, which is one period of sleep within 24 hours. Biphasic (or diphasic , bifurcated , or bimodal ) sleep refers to two periods, while polyphasic usually means more than two. [ 1 ]
Polyphasic sleep is the term used to describe any sleep pattern that includes three or more periods of shuteye in a 24-hour period instead of the more traditional large snooze at night.
In polyphasic sleep, an organism sleeps several times in a 24-hour cycle, ... They can include apparent sensations of all types, especially vision and movement.
A nap is a short period of sleep, typically taken during daytime hours as an adjunct to the usual nocturnal sleep period. Naps are most often taken as a response to drowsiness during waking hours. A nap is a form of biphasic or polyphasic sleep, where the latter terms also include longer periods of sleep in addition to one period. For years ...
Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
Why We Nap: Evolution, Chronobiology, and Functions of Polyphasic and Ultrashort Sleep is a 1992 book edited by Claudio Stampi, sole proprietor of the Chronobiology Research Institute. It is frequently mentioned by " polyphasic sleepers ", as it is one of the few published books about the subject of systematic short napping in extreme ...
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He is the editor and contributor of three chapters to Why We Nap: Evolution, Chronobiology, and Functions of Polyphasic and Ultrashort Sleep. [4] The book is considered a reference on the subject and widely available in academic libraries, six editions were published between 1992 and 2014 with a foreword by Jürgen Aschoff , the co-founder of ...