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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").
Sign with text: Sömnförsök pågår (Sleep study in progress), room for sleep studies in NÄL hospital, Sweden. A sleep study is a test that records the activity of the body during sleep. There are five main types of sleep studies that use different methods to test for different sleep characteristics and disorders.
Employers have varying views of sleeping while on duty. Some companies have instituted policies to allow employees to take napping breaks during the workday in order to improve productivity [11] while others are strict when dealing with employees who sleep while on duty and use high-tech means, such as video surveillance, to catch their employees who may be sleeping on the job.
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Electrode locations of International 10-20 system for encephalography recording. The 10–20 system or International 10–20 system is an internationally recognized method to describe and apply the location of scalp electrodes in the context of an EEG exam, polysomnograph sleep study, or voluntary lab research.
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The Multiple Sleep Latency Test (MSLT) measures a person's physiological tendency to fall asleep during a quiet period in terms of sleep latency, the amount of time it takes for someone. An MSLT is normally performed after a nocturnal polysomnography to ensure both an adequate duration of sleep and to exclude other sleep disorders.
The Multiple Sleep Latency Test (MSLT) is a sleep disorder diagnostic tool. It is used to measure the time elapsed from the start of a daytime nap period to the first signs of sleep, called sleep latency. The test is based on the idea that the sleepier people are, the faster they will fall asleep.