Charcot-Wilbrand Syndrome - Detection Methods - Polysomnography

Polysomnography

A Polysomnography test (PSG) records the biological changes during sleep through monitoring the brain (Electroencephalography, EEG), eye movement (Electrooculography, EOG), heart rhythm (Electrocardiogram, ECG), and muscle activity (Electromyography, EMG). Typically a complete PSG requires a minimum of 12 channels and 22 wire attachments and produces a “score” or report. Sleep stages are identifiable through comparison of the EEG, EOG and EMG channels with stages 1 and 2 being defined as light sleep, 3 being slow wave sleep and 4 being REM sleep. Additionally a PSG can reveal “arousals” or sudden shifts in brain wave activity. Analyzing the resulting amount of REM sleep in combination with patient reported dream experience has been the method of choice for recent dream studies. In particular researchers can wake the patient mid-REM sleep and ask for dream experience, which in normal patients would enhance their recollection and dream count. Absence of dream experience suggests the presence of CWS and this test method can also help to illustrate whether the patient is suffering from an inability to recall visual images or complete dream loss.

Read more about this topic:  Charcot-Wilbrand Syndrome, Detection Methods

Other articles related to "polysomnography":

Sleep Medicine - Diagnostic Methods
... It is cost-efficient when full polysomnography is not required ... Polysomnography is performed in a sleep laboratory while the patient sleeps, preferably at his or her usual sleeping time ... Polysomnography is not routinely used in the evaluation of patients with insomnia or circadian rhythm disorders, except as needed to rule out other disorders ...
Non-rapid Eye Movement Sleep - Polysomnography
... Polysomnography (PSG) is a test used in the study of sleep the test result is called a polysomnogram ...
Polysomnography - "Split Night" Study - Example of Summary Report From A "split Night" Study
... During the first 71 minutes of sleep Mr ... B____ manifested 83 obstructive apneas, 3 central apneas, 1 mixed apnea and 28 hypopneas, for an elevated apnea+hypopnea index (AHI) of 97 events/hr (*"severe" OSA) ...
Actigraphy - Purpose - Sleep
... Contrary to polysomnography, the patient remains movable and does not necessarily need to be located in a laboratory while the required data is being ... Sleep actigraphs are also more affordable than performing a polysomnography and can therefore be advantageous as well, particularly when conducting large field tests ... being employed in sleep clinics to replace full polysomnography ...