Stage 1
Stage 1 is essentially the “dozing off” stage, and it normally lasts just one to five minutes.
During N1 sleep, the body hasn’t fully relaxed, though the body and brain activities start to slow with periods of brief movements (twitches). There are light changes in brain activity associated with falling asleep in this stage.
It’s easy to wake someone up during this sleep stage, but if a person isn’t disturbed, they can move quickly into stage 2.
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- When people are relaxed and ready to fall asleep, their EEG will show mostly alpha waves. When people fall asleep, they enter into stage 1 sleep, which lasts just a few minutes. In stage 1, the EEG shows mostly theta waves. Heart rate, breathing rate, and body temperature drop, and muscles r...
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