Joanies Smiles

Sleep study, also called polysomnography (PSG) is a multi-parametric test that is used to study sleep. It is also used as a diagnostic tool in sleep medicine. The result of the test is called polysomnogram derived from Greek and Latin words. Sleep study is an in depth recording of the biophysical changes during sleep. During the period of sleep, body functions are monitored. This includes the brain, eye movements, muscle activity and heart rhythm. In the discovery of sleep apnea in 1970′s, monitoring of other physiologic functions is necessary which includes breathing functions respiratory airflow and respiratory effort along with the use of peripheral pulse oximeter. Article Source: http://EzineArticles.com/5693485