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Individuals with this trait are known for having the life-long ability of being able to sleep for a lesser amount of time than average people, usually 4 to 6 hours (less than the average sleeptime of 8 hours) each night while waking up feeling relatively well-rested, they also have a notable absence of any sort of consequence that derives from depriving oneself of sleep, something an average ...
The average adult needs to sleep for 7 to 8 hours every 24 hours, and sleep deprivation can occur if they do not get enough sleep. [3] Acute sleep deprivation is when a person sleeps less than usual or does not sleep at all for a short period of time, normally lasting one to two days, but tends to follow the sleepless pattern for longer with no ...
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] Segmented sleep and divided sleep may refer ...
Advanced Sleep Phase Disorder (ASPD), also known as the advanced sleep-phase type (ASPT) of circadian rhythm sleep disorder, is a condition that is characterized by a recurrent pattern of early evening (e.g. 7-9 PM) sleepiness and very early morning awakening (e.g. 2-4 AM). This sleep phase advancement can interfere with daily social and work ...
Insomnia, also known as sleeplessness, is a sleep disorder where people have trouble sleeping. [1][11] They may have difficulty falling asleep, or staying asleep for as long as desired. [1][9][12] Insomnia is typically followed by daytime sleepiness, low energy, irritability, and a depressed mood. [1] It may result in an increased risk of ...
In another study that followed about 70.000 women for 16 years, there was a significant increase in body weight in those who slept 5 hours or less compared to those who slept 7–8 hours. [1] [2] [8] As sleep time decreased over time from the 1950s to 2000s from about 8.5 hours to 6.5 hours, there has been an increase in the prevalence of ...
Nap. A man napping in a hammock, on a patio in Costa Rica. 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 ...
Polysomnography (PSG) is a multi-parameter type of sleep study [1] and a diagnostic tool in sleep medicine.The test result is called a polysomnogram, also abbreviated PSG.The name is derived from Greek and Latin roots: the Greek πολύς (polus for "many, much", indicating many channels), the Latin somnus ("sleep"), and the Greek γράφειν (graphein, "to write").