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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").
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 wakefulness. In humans, this cycle takes 70 to 110 minutes (90 ± 20 minutes). [ 1]
The Pittsburgh Sleep Quality Index ( PSQI) is a self-report questionnaire that assesses sleep quality over a 1-month time interval. The measure consists of 19 individual items, creating 7 components that produce one global score, and takes 5–10 minutes to complete. [ 1] Developed by researchers at the University of Pittsburgh, [ 2] the PSQI ...
Here are her tried-and-true tips after 25 years as a professional traveler: Avoid caffeine: Brown recommends turning down the in-flight coffee service so that the caffeine doesn't keep you up ...
Under pressure from lobbyists and Capitol Hill, the FDA in 1997 produced new guidelines declaring that companies’ ads just had to devote roughly equal time to the risks and benefits of a drug. One year later, spending on television drug ads had more than doubled, from $310 million to $664 million.
3,564,345 United States dollar (2017, 2018) The National Sleep Foundation ( NSF) is an American non-profit, charitable organization. Founded in 1990, its stated goal is to provide expert information on health-related issues concerning sleep. [ 1] It is largely funded by pharmaceutical and medical device companies.
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, scientists have been investigating the benefits of napping, including the 30-minute nap as well as sleep durations of 1–2 hours. Performance across a wide range of cognitive processes has been ...
List of Zoey 101 episodes. List of. Zoey 101. episodes. Zoey 101 is an American comedy drama television series created by Dan Schneider for Nickelodeon. It aired from January 9, 2005, to May 2, 2008. A total of 61 episodes were aired, spanning four seasons.