问答题

Please describe sleep phase and characteristic of each phase. (8 Points)

【参考答案】

睡眠的时相分慢波睡眠和快波睡眠。慢波睡眠特点：脑电波呈现慢波，感觉减退，肌紧张降低，自主神经系统变化，如瞳孔缩小，心率减......

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