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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 ]
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 ...
Pages for logged out editors learn more. Contributions; Talk; Biphasic and polyphasic sleep
Biphasic, meaning having two phases, may refer to: Phase (matter) , in the physical sciences, a biphasic system, e.g. one involving liquid water and steam Biphasic sleep , a nap or siesta in addition to the usual sleep episode at night
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 ...
Sample hypnogram showing one sleep cycle (the first of the night) from NREM through REM. The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and ...
After an average of three to five hours of sleep, the subjects would awaken and spend an hour or two in quiet wakefulness before a second three- to five-hour sleep period. It was thus suggested that such a biphasic pattern of sleep is the natural or pre-historic tendency for humans.
Biphasic and polyphasic sleep – Sleep pattern with more than one period of sleep in a 24-hour period Sleep disorder – Medical disorder of a person's sleep patterns Yoga nidra – State of consciousness between waking and sleeping induced by a guided meditation