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REM sleep definition is - a state of sleep that recurs cyclically with non-REM sleep several times during a normal period of sleep, is characterized especially by greatly depressed muscle tone, dreaming with vivid imagery, rapid eye movements, and increased neuronal activity in certain brain regions (such as the pons), and typically comprises up to 25% of time spent in sleep —called also ...
REM sleep: REM sleep is the portion of sleep when there are rapid eye movements (REMs). Dreams occur during REM sleep. We typically have 3 to 5 periods of REM sleep per night. They occur at intervals of 1-2 hours and are quite variable in length. An episode of REM sleep may last 5 minutes or over an hour. About 20% of sleep is REM sleep.
Rem sleep definition, a recurrent period of sleep, typically totaling about two hours a night, during which most dreaming occurs as the eyes move under closed lids and the skeletal muscles are deeply relaxed.
The sleep cycle begins with non-REM sleep, before moving into the REM sleep stage. The first phase of REM usually lasts for 10 minutes, with each phase getting progressively longer.
Rapid eye movement, or REM sleep, is the final phase of the four stage cycle that occurs during sleep. Unlike non-REM sleep, the fourth phase is characterized by an increase in brain activity and autonomic nervous system functions, which are closer to what is seen during the awakened state.
REM sleep synonyms, REM sleep pronunciation, REM sleep translation, English dictionary definition of REM sleep. n. A period of sleep during which dreaming takes place, characterized by rapid periodic twitching movements of the eye muscles and other physiological...