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Shift work sleep disorder (SWSD) is a circadian rhythm sleep disorder characterized by insomnia, excessive sleepiness, or both affecting people whose work hours overlap with the typical sleep period. Insomnia can be the difficulty to fall asleep or waking up before the individual has slept enough. [ 1 ]
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 ]
By the time infants reach the age of two, their brain size has reached 90 percent of an adult-sized brain; [86] a majority of this brain growth has occurred during the period of life with the highest rate of sleep. The hours that children spend asleep influence their ability to perform on cognitive tasks.
In people aged 65 years and younger, daily sleep duration of 5 hours or less (amounting to a sleep deficit of 2 hours per day) during weekends correlated with a 52% higher mortality rate—as compared to a control group who slept for 7 hours. [7] Consistent weekday sleep debt exhibited a detrimental association with mortality and morbidity, but ...
The current formal name established in the third edition of the International Classification of Sleep Disorders (ICSD-3) is delayed sleep-wake phase disorder. Earlier, and still common, names include delayed sleep phase disorder (DSPD), delayed sleep phase syndrome (DSPS), delayed sleep phase type (DSPT), and circadian rhythm sleep disorder. [37]
They woke me up in the middle of the night to transfer me to Research Psychiatric. It was quiet in the ward: Everyone was asleep. Back then, in the winter of 2010, I had extraordinarily vivid dreams, and I loved to dream, because I often dreamt of my children and other good things that were no longer part of my waking everyday life.
These so-called “lies” turned out to be small, everyday gestures of love, kindness, and support. Scroll down to see some of the most wholesome ones! 68 Lies Men Tell Their Partners: “She’s ...
They also show lower sleep propensity after total sleep deprivation than do normal sleepers. [6] Non-24 can begin at any age, not uncommonly in childhood. It is sometimes preceded by delayed sleep phase disorder. [7] Most people with this disorder find that it severely impairs their ability to function in school, in employment, and in their ...
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