Published:Thu, 18 Feb 2010 00:46:37 GMT
Thomas Goetz is the Executive Editor of Wired and the author of The Decision Tree , a new book about how tracking and research can better inform our own health decisions. Here, as......
Published:Thu, 18 Feb 2010 00:24:29 GMT
Thomas Goetz is the Executive Editor of Wired and the author of The Decision Tree, a new book about how tracking and research can better inform our own health decisions. Here, as ......
Published:Tue, 16 Feb 2010 17:03:21 GMT
TUESDAY, Feb. 16 (HealthDay News) -- The breathing woes that accompany severe sleep apnea may be counterbalanced by this silver lining: those with the condition report fewer night......
Published:Mon, 15 Feb 2010 17:14:58 GMT
This is the first large study to address both reported dream and nightmare recall frequency in a clinically evaluated sample of patients with a high frequency of severe OSA......
Published:Mon, 15 Feb 2010 15:21:52 GMT
A study in the Feb. 15 issue of the Journal of Clinical Sleep Medicine shows that patients with severe obstructive sleep apnea (OSA) report a significantly lower frequency of nigh......
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 'poly' for multi-channel (many), 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.
Source: Wikipedia.org
