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Restorative Sleep Staging

Meaning

Restorative Sleep Staging is the clinical and technological process of accurately classifying the different phases of a nocturnal sleep period—specifically distinguishing between Wake, Light Sleep (N1/N2), Deep Sleep (SWS or N3), and REM Sleep—to assess the quality and functional completeness of the sleep architecture. The focus is on quantifying the time spent in the non-REM stages, particularly Deep Sleep, and the REM phase, as these are the primary periods for physical and cognitive repair, respectively. A robust staging pattern is a key biomarker for overall hormonal and neurological health.