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Polysomnography

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Polysomnography

Post by OrjoWan on Sat Aug 28, 2010 7:25 pm


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Polysomnography PSG

also known as a sleep study
is a multi-parametric test used in the study of sleep and as
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 .. polus for "many, much", indicating many channels
the Latin somnus ("sleep"), and the Greek (graphein, "to write

Polysomnography
is a comprehensive recording of the biophysiological
changes that occur during sleep
It is usually performed at night, when most people sleep
though some labs can accommodate shift workers and people
with circadian rhythm sleep disorders and do the test at other times of day

The PSG monitors many body functions including
brain (EEG), eye movements (EOG), muscle activity or skeletal muscle
activation (EMG) and heart rhythm (ECG) during sleep
After the identification of the sleep disorder sleep apnea
in the 1970s, the breathing functions respiratory airflow and respiratory
effort indicators were added along with peripheral pulse oximetry

:D


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