![]() ![]() "The longer you spend in deeper sleep, the more refreshed you'll feel in the morning," she says. But, in general, people alternate among several different levels of non-REM and REM sleep every night. Krahn says not everyone goes through all of the stages. "They're paralyzed, and that's actually felt probably to be a rinsing function - to clear the brain of toxins and byproducts that have collected during the waking day."ĭr. "Things speed up except a person cannot move," says Dr. Usually, the first period of REM sleep occurs around 90 minutes into your sleep cycle and lasts about 10 minutes. The final stage is REM sleep, which is typically when you dream. ![]() "And that just allows the body a chance to recover from the busy day." During this time, your muscles are still functional, which is why this is the stage in which sleepwalking and sleep. ![]() "When we're in deep sleep, our heart rate and our breathing really slows down," says Dr. Krahn says the three types of non-REM, which stands for rapid eye movement, include level one, which is light sleep level two, intermediate sleep and level three, deep sleep. Lois Krahn, a Mayo Clinic sleep medicine specialist.ĭr. Ideally, time in REM sleep should get progressively longer with each cycle as the amount of time spent in deep sleep (stage 4) decreases. Rapid eye movement sleep (REM sleep or REMS) is a unique phase of sleep in humans, mammals and birds, characterized by random rapid movement of the eyes. "We basically divide sleep into wake, non-REM - three types - and REM sleep," says Dr. When your head hits the pillow, your body can go through several stages of sleep. Journalists: Broadcast-quality video pkg (1:00) is in the downloads. ![]()
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