sleep cycle stages
Ad ZzzQuil Over the Counter Is Just What You Need To Get a Beautiful Nights Rest. Find the Products Insights and Expertise You Need To Get the Zzzs You Deserve. Discover What The Stages Of Sleep Are And Their Impact On Health This stage is distinguished by the absence of rapid eye movements NREM the relaxation of muscle tissue a decrease in core. . Stage III non-REM sleep is. The first stage is when you start to drift into a light sleep. The first three sleep stages are non-rapid eye movement NREM sleep. You may experience changes in brain activity heavy and rolling eye movements. This stage is called deep. REM Rapid Eye Movement and NREM Non-Rapid Eye Movement. NREM sleep dominates the first half of the night and REM dominates the second half of the night. The Stages of Sleep. Descent into stage II non-REM sleep is characterized by 1015 Hz oscillations 50150 μV called spindles which occur periodically and last for a few s...