Norepinephrine as well as orexin maintain some parts of the mind active while we are awake. Various other natural chemicals that shape sleep and also wakefulness consist of acetylcholine, histamine, adrenaline, cortisol, and also serotonin. Stage 1 non-REM rest is the transition from wakefulness to sleep. During this short duration of fairly light sleep, your heart beat, breathing, and eye activities slow, and also your muscle mass unwind with occasional twitches. Your brain waves begin to slow down from their daytime wakefulness patterns.

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