REM sleep
A period of desynchronized EEG activity during sleep, at which time dreaming, rapid eye movements, and muscular paralysis occur; also called paradoxical sleep
REM (Rapid Eye Movement) sleep is a phase of the sleep cycle that occurs after NREM (Non-Rapid Eye Movement) sleep. It is characterized by rapid eye movements, which give it its name, and increased brain activity. During REM sleep, the body is essentially paralyzed, which prevents the person from acting out dreams.
REM sleep is essential for a number of important functions, including memory consolidation and emotional regulation. It is also believed to play a role in the development of the brain and the formation of neural connections.
The first REM cycle typically occurs around 90 minutes after falling asleep and lasts for around 10 minutes. As the night goes on, REM cycles become longer, with the final cycle lasting up to an hour. On average, a person will experience around four to five REM cycles each night, making up around 25% of their total sleep time.
Disruptions to REM sleep can have a number of negative effects on physical and mental health. Lack of REM sleep has been linked to problems with memory, cognitive functioning, and emotional regulation. It has also been linked to an increased risk of mental health conditions such as depression and anxiety.
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