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There are 4 non-REM stages and REM sleep.
Tongue by REM
REM (Rapid Eye Movement) and Non-REM sleep are two distinct phases of the sleep cycle. Non-REM sleep is further divided into three stages, characterized by slower brain waves, reduced heart rate, and physical relaxation, and is crucial for restorative processes. In contrast, REM sleep is marked by rapid eye movements, increased brain activity, and vivid dreaming, playing a key role in memory consolidation and emotional processing. Overall, Non-REM is more about physical recovery, while REM focuses on mental and emotional health.
Usually, rem would mean "remaining", as in, "for all remaining stitches" etc.
Yes
episodic and semantic
REM could mean Rapid Eye Movement, R.E.M the pop group, or it could mean the website - more information required
Sleep is prompted by natural cycles of activity in the brain and consists of two basic states: rapid eye movement (REM) sleep and non-rapid eye movement (NREM) sleep, which consists of Stages 1 through 4. During sleep, the body cycles between non-REM and REM sleep. Typically, people begin the sleep cycle with a period of non-REM sleep followed by a very short period of REM sleep. Dreams generally occur in the REM stage of sleep. Then the cycle repeats all over again.
There are 7: Distress Active Alert Alert Inactive Drowsiness Periodic sleep REM sleep Non-REM sleep
Rapid Eye Movement
Sleepwalking usually only occurs during stage 3 of non-rem sleep.
Very long and slow A+