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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").
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.
[citation needed] It was number one in the US for five weeks and sold over 1.4 million copies there. [19] In the UK, it topped the singles chart for seven weeks, [20] and at seven minutes and 52 seconds, "I'd Do Anything for Love" becoming the longest song on top there since The Beatles' hit "Hey Jude". [21]
The respiratory disturbance index ( RDI )—or respiratory distress Index —is a formula used in reporting polysomnography (sleep study) findings. Like the apnea-hypopnea index (AHI), it reports on respiratory distress events during sleep, but unlike the AHI, it also includes respiratory-effort related arousals (RERAs). [ 1]
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.
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]
K-complex consists of a brief negative high-voltage peak, usually greater than 100 μV, followed by a slower positive complex around 350 and 550 ms and at 900 ms a final negative peak. K-complexes occur roughly every 1.0–1.7 minutes and are often followed by bursts of sleep spindles. They occur spontaneously [1] but also occur in response to ...
Far too many of us have trouble falling asleep frequently. But good sleep has so many benefits for our physical and mental health that it's important to keep trying to get quality rest. And a ...