Exploratory analysis uncovers REM sleep’s protective role against N-REM sleep vulnerabilities, suggesting evolutionary significance.
• REM sleep's primary function is to reduce the vulnerability caused by N-REM sleep. • REM sleep parameters are directly related to the body’s protection or vulnerability. • REM sleep is cyclic due to its protective function. • REM sleep probably emerged as a brief awakening from N-REM sleep. • REM density is a measure of the organism’s alertness.
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Raffael Brito Spinassi (2026) studied this question.
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