I purchased the tub as well as most of the other fixtures needed for a major bathroom remodel off the internet. Some of the other fixtures came from Overstock. This was the worst of my experience and the reason people should be cautious about ordering on line. The tub appears to be of quality.
Each stage has characteristics that can be measured. A sleep study is a number of tests done at the same time during sleep. The tests measure specific sleep characteristics and help to diagnose sleep disorders. A sleep study may also be called polysomnogram. The basic recordings done during a sleep study may include:
The studies are done to find out what is causing your sleep problems. Sleep studies can also determine whether you have a problem with your stages of sleep. The two main types of sleep are non-rapid eye movement (NREM) and rapid eye movement (REM). Normally, NREM and REM alternate 4 to 5 times during a night's sleep. A change in this cycle may make it hard for you to sleep soundly.