![]() This flexibility extends to neurons which can form more easily allowing the neocortex – responsible for high cognitive functions- to unconsciously search and establish connections between seemingly unrelated things. During this time, the brain is highly active but the body is not and people can experience vivid dreams.Īdditionally, the release of acetylcholine, a chemical that enters the brain, causes the hippocampus and neocortex to enter a flexible state. People experience the longest duration of REM sleep right before waking up. Research suggests that this is because we have recently woken up from REM sleep. ![]() People often express that they are more productive, make decisions more effectively, are the clearest, and more creative in the morning. People can experience intense dreams during REM sleep because there is brain activity and body immobility simultaneously.Ĭycling through non-REM and REM sleep revitalizes tissue, builds muscles and bones, strengthens the immune system, and restores energy. During REM sleep, there are more physiological indicators of wakefulness: increased respiration, brain activity, rapid eye movement etc. The first period of REM sleep is usually about 10 minutes, and the last may be an hour.
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