The nurse, seeing a client asleep, turns off the television in the room. The client opens her eyes and says "I was watching that. I wasn't sleeping." The nurse realizes that the client was demonstrating which stage of NREM sleep?
1. IV.
2. III.
3. II.
4. I.
Correct Answer: 4
Rationale 1: Stage IV is the deepest stage of sleep, and the sleeper is difficult to arouse.
Rationale 2: Stage III is a deeper stage of sleep, and the sleeper is difficult to arouse.
Rationale 3: Stage II is the stage of light sleep during which body processes continue to slow down. The eyes are generally still, the heart and respiratory rates decrease slightly, and body temperature falls. An individual in stage II requires more intense stimuli than in stage I to awaken, such as touching or shaking.
Rationale 4: Stage I is the stage of very light sleep, and lasts only a few minutes. During this stage, the person feels drowsy and relaxed, her eyes roll from side to side, and her heart and respiratory rates drop slightly. The sleeper can be readily awakened, and might deny that she was sleeping.
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