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REM Sleep Density

Meaning

REM Sleep Density is a quantitative physiological measure of the intensity and frequency of rapid eye movements (REMs) occurring specifically during the Rapid Eye Movement (REM) stage of sleep. It serves as a physiological proxy for the level of central nervous system activation and the depth of REM sleep, which is the stage most intimately associated with vivid dreaming, crucial memory consolidation, and deep emotional processing. A higher density generally indicates a more robust, intense, and qualitatively superior period of REM sleep, reflecting optimal brain function.