Washington, D.C. Votes To Legalize Recreational Marijuana. In yet another blow to the United States' decades-long war on drugs, the nation's capital has legalized recreational marijuana, NPR and USA Today reported Tuesday night.
What happens every time we get a bit of shut eye? Sleep occurs in a recurring cycle of 90 to 110 minutes and is divided into two categories: non-REM (which is further split into four stages) and REM sleep. Non-REM sleep. Stage one: Light Sleep. During the first stage of sleep, we're half awake and half asleep. Our muscle activity slows down and slight twitching may occur. This is a period of light sleep, meaning we can be awakened easily at this stage.
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.