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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.
Napping behavior during daytime hours is the simplest form of polyphasic sleep, especially when the naps are taken on a daily basis. The term polyphasic sleep was first used in the early 20th century by psychologist J. S. Szymanski, who observed daily fluctuations in activity patterns. [2] It does not imply any particular sleep schedule.
The 20 and 30-minute periods of sleep showed evidence of sleep inertia immediately after the naps and improvements in alertness more than 30 minutes later, but not to a greater level than after the 10 minutes of sleep. [3] Power naps are effective even when schedules allow a full night's sleep. [4]
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EDS can affect the ability to function in family, social, occupational, or other settings. [1] [2] A proper diagnosis of the underlying cause and ultimately treatment of symptoms and/or the underlying cause can help mitigate such complications. [3] According to the National Sleep Foundation, around 20 percent of people experience EDS. [4]
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Napping on a regular basis triggers an elevated risk of developing high blood pressure and having a stroke.
The decrease in systolic blood pressure, diastolic blood pressure, and heart rate signal a state of calmness, which is essential for having a good night sleep. Sedative music, which is characterized by a slow tempo, repetitive rhythm, gentle contours, and strings, is effective in generating anxiolytic responses to aid sleep.