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A hallmark of sleep disordered breathing is the occurrence of arousals during sleep. Such arousals elicit generalized autonomic activation, which among other physiological changes, includes sympathetic nervous system-mediated peripheral vasoconstriction, and transient pulse rate elevation. The PAT technology allows measurement of these changes ...
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").
For home-testing for an unusually low sleep latency and potential sleep deprivation, the authors point to a technique developed by Nathaniel Kleitman, the "father of sleep research". The subject reclines in a quiet, darkened room and drapes a hand holding a spoon over the edge of the bed or chair, placing a plate on the floor beneath the spoon.
Overhead view from a fisheye lens of the Z machine at Sandia National Laboratory. Due to the extremely high voltage, the power feeding equipment is submerged in concentric chambers of 2 megalitres (2,000 m³) of transformer oil and 2.3 megalitres (2,300 m³) of deionized water, which act as insulators.
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.
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.
The actigraph is recorded at home, and therefore a high compliance is needed: [20] patients need to complete a sleep diary and always wear the watch. [20] Sometimes, the actigraph doesn't properly record sleep; for example, a nap during a car ride isn't always logged as sleep. [ 20 ]
Z machine may refer to: Z-machine, a text-based game interpreter; Z Pulsed Power Facility, an x-ray generator at Sandia National Laboratories, informally known as the ...