$399.00 USA Â£349 UK â¬399 EUR. Sony officially announced the price of the Playstation 4 - $399.00. A year and a half after the official release of both the Xbox One and the PS4, we've seen the Xbox One already slash it's price $50.
The most classical sleep disorder associated with uncontrollable sleep attacks is narcolepsy. However, there are other sleep disorders associated with daytime sleepiness. Persons with Obstructive Sleep Apnea or Restless Legs Syndrome often suffer from daytime sleepiness.
Polysomnography monitors your sleep stages and cycles to identify if or when your sleep patterns are disrupted and why. The normal process of falling asleep begins with a sleep stage called non-rapid eye movement (NREM) sleep. During this stage, your brain waves, as recorded by electroencephalography (EEG), slow down considerably. Your eyes don't move back and forth rapidly during NREM, in contrast to later stages of sleep. After an hour or two of NREM sleep, your brain activity picks up again, and rapid eye movement (REM) sleep begins. Most dreaming occurs during REM sleep. You normally go through four to six sleep cycles a night, cycling between NREM and REM sleep in about 90 minutes.