The night nurse goes quietly into the sleeping client's room to assess him. The client wakes up as soon as the nurse is in the room. The nurse knows that the client was most likely in which stage of sleep?
1. Stage 1: NREM
2. Stage 2: NREM
3. Stage 3: NREM
4. Stage 4: NREM
ANS: 1
Stage 1 NREM includes the lightest level of sleep. Sensory stimuli such as noise easily arouses the person. The stage lasts a few minutes. Decreased physiological activity begins with gradual fall in vital signs and metabolism. Awakened, person feels as though daydreaming has occurred. Stage 2 NREM is a period of sound sleep. Stage 3 NREM involves initial stages of deep sleep. Stage 4 NREM is the deepest stage of sleep. It is very difficult to arouse the sleeper.
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