睡眠占据了人生的1/3时间。因此,睡眠至今仍是不少科学工作者探索的对象。由于研究条件的特殊,迄今人类对于睡眠的认识还极为肤浅。因为当受试者开始讲述睡眠过程的“实况”时,实际上他已经清醒了。加上伴随着睡眠的做梦现象,又给睡眠添上一层神秘色彩。不少人开始认为,睡眠也许有一种“睡眠素”在起作用。犹如肾上腺素能使心跳加快,生长素能调节生长,“睡眠素”则使人昏昏欲睡。对狗的 Sleep occupies 1/3 of the life time. Therefore, sleep is still a lot of scientific workers to explore the object. Due to the special conditions of research, so far the human understanding of sleep is still extremely superficial. Because when the subject started to tell the “live” of the sleep process, he was in fact awake. Coupled with the dream of sleep accompanied by sleep, but also add a layer of mystery to sleep. Many people began to think that sleep may have a “sleep hormone” at work. Just as adrenaline accelerates the heartbeat, growth hormone regulates growth, and “sleep hormone” drowsiness. For dogs