During non-REM sleep, participants received auditory cues to reinforce positive memories and reduce negative ones.

A wrist-worn activity tracker recorded both movement and heart rate. From those signals, periods of deep (NREM) sleep and REM ...

Martin said: "A normal sleep cycle consists of four stages: three stages of non-rapid eye movement (NREM) and, finally, one stage of REM (rapid eye movement). These cycles repeat in this order ...

REM sleep onset latency, latency to non-rapid eye movement (NREM) stage three (N3) sleep, sleep architecture, and subjective sleep quality. The researchers searched publication databases for ...

as was the duration of each episode of nonrapid eye movement (NREM) sleep stages 1 (NREM1), 2 (NREM2), and 3–4 (SWS), and rapid eye movement (REM) sleep. The data were analyzed according to the ...

alternating periods of lighter REM sleep and deeper NREM sleep occur. The ‘Good Sleep’ mode continually modifies the temperature throughout the night, adjusting it approximately three times.