How does the interplay between sleep architecture, circadian rhythms, and neurochemical processes in the brain contribute to the regulation of sleep stages and the overall function and health benefits of sleep?

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Sleep Physiology

Sleep is a condition of reduced muscle movement in the body. Awareness about the surroundings is reduced at the time of sleep. The body stays mildly responsive or non-responsive to external stimuli. The sleep-wake cycle is controlled by the circadian rhythm that produces a resting phase for the body.