This takes about 1 to 2 hours after falling asleep. The brain paralyzes your muscles so you do not act out the dreams.ĭuring sleep, a person usually progresses through the 3 stages of non-REM sleep before entering REM sleep.During REM sleep, it is normal to have short episodes when breathing stops (apnea). Deep sleep is one of the 5 stages of sleep including awake time, light sleep, deep sleep, and rapid eye movement, or REM sleep. And, during that, you’ll probably get about 2 hours of deep sleep. Medical advice states that most people need 7 to 9 hours of sleep a night. In the REM phase, your blood pressure, heart rate, and breathing rise. That depends on how much sleep you personally need overall. While in the latter there’s absolute synchronization, REM sleep is characterized by brain waves of lower amplitude and higher frequency, similar to those you have when you’re awake.

It is very hard to wake up someone in stage N3. One of the differences between REM sleep and deep sleep lies in the brain waves. During this stage, delta brain activity increases and you may have some body movements. Stage N3 is deep sleep and lasts about 20 to 40 minutes.During this stage, your muscles become more relaxed and you may begin to have slow-wave (delta) brain activity. Stage N2 lasts from about 30 to 60 minutes.It involves light sleep from which you can be awakened easily. Many people cycle through these stages throughout the night in the pattern of: Light deep Deep sleep Light sleep REM, but these cycles can vary. Stage N1 occurs right after you fall asleep and is very short (usually less than 10 minutes).Non–rapid eye movement sleep has three stages: The sleep cycle is divided into two main stages: non-rapid eye movement (non-REM) and rapid eye movement (REM).

Rem sleep deep sleep