... NREM) sleep Stages of NREM sleep o stage 1 Falling Sleep - transition state between sleep and wakefulness - eyes begin to roll slightly - consists mostly of theta waves (high amplitude, low frequency (slow) - brief periods of alpha waves, similar to those present while awake - lasts only for a few minutes before moving on to next stage-very short stage, usually occurring a few minutes after bedtime ... irregular - the heart rate begins to slow, and muscles relax - easy to awaken and may not realize that he or she has been asleep o stage 2 Deeper stage - peaks of brain waves become higher...

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