Dreaming, memory-making, problem-solving: A lot happens during the most active sleep phase.
Any sleep tracker will show you that slumber is far from a passive affair. And no stage of sleep demonstrates that better than rapid eye movement, or REM, commonly called dream sleep.
While the body typically remains “off” during REM sleep, the brain is very much “on.” It’s generating vivid dreams, as well as synthesizing memories and knowledge. Scientists are still working to unravel exactly how this strange state of consciousness works. After that, REM sleep begins, and your heart rate, breathing and brain activity all increase. Brain regions involved in processing emotions and sensory input light up. Meanwhile, your brain paralyses the muscles in your arms and legs, preventing you from acting out your dreams, Dr Dasgupta explained.that repeat four to six times in a typical night. Then, after your last REM cycle, you wake up rested and alert, said Dr.
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