1. Polyphasic sleepPolyphasic sleep, a term coined by early 20th-century psychologist J.S. Szymanski, refers to the practice of sleeping multiple times in a 24-hour period—usually more than two, in contrast to biphasic sleep (twice per day) or monophasic sleep (once per day). It does not imply any particular sleep schedule. The circadian rhythm disorder known as irregular sleep-wake syndrome is an example of polyphasic sleep in humans.
Read “Polyphasic sleep” on English Wikipedia
Read “多相睡眠” on Japanese Wikipedia
Read “Polyphasic sleep” on DBpedia
Read “Polyphasic sleep” on English Wikipedia
Read “多相睡眠” on Japanese Wikipedia
Read “Polyphasic sleep” on DBpedia
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