polysomnographyA polysomnography is a test used in the study of sleep. States and sleep stages are defined according to human characteristic patterns that are observed through the electroencephalogram (EEG), the electrooculograma (EOG, a measurement of eye movements) and electromyogram surface (EMG). The polysomnography is the registration of these electrophysiological parameters that define the states of sleep and wakefulness.It is a sleep study that measures the sleep cycles and stages by recording brain waves from (EEG), electrical activity of muscles, eye movements, respiratory rate, blood pressure, oxygen saturation in the blood and heart rate.
The polysomnography is usually done in a sleep study center, where the person lies down on a bed. The review can be done overnight so that it can study the normal sleep patterns. The physician will place electrodes on the chin, scalp and the outer edge of the eyelids, which must remain in place while the person sleeps. Signals from electrodes are recorded while the person is awake with eyes closed and during sleep. Measure the time that the person needs to sleep and the time it takes to enter the dream MOR.
Tags: polysomnography, Sleep patterns, States and sleep stages, States of sleep and wakefulness, Study of sleep