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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").
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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.
This locator map is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Cropped down to Northern California . The original can be viewed here: USA California location map.svg : .
Name used in the default map caption; image = USA California location map.svg The default map image, without "Image:" or "File:" image1 = Relief map of California.png An alternative map image, usually a relief map, which can be displayed via the relief or AlternativeMap parameters; top = 42.2 Latitude at top edge of map, in decimal degrees ...
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.
This image is a derivative work of the following images: USA California location map.svg licensed with Cc-by-3.0, GFDL . 2009-06-05T19:17:46Z NordNordWest 1022x1171 (491838 Bytes) more detailed
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