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总结
多家国际媒体报道，最新研究发现水母虽没有大脑，却会出现与人类相似的“睡眠样”状态：在特定节律中活动减少、对外界刺激反应变弱，并呈现类似小睡的行为模式；在被剥夺休息后还可能出现补偿性休息。相关结果被认为为睡眠为何存在、以及其在进化上可能早于复杂神经系统出现提供线索，并与“睡眠具有双重功能/双阶段特征”等观点相呼应，提示某些关键睡眠节律或可追溯到远古时期。
正文
Jellyfish sleep like humans - even though they don't have brains Nature Jellyfish Snooze Like We Do, And It Could Explain The Origins of Sleep ScienceAlert Jellyfish sleep about as much as humans do - and nap like us too New Scientist Snoozing dragons stir up ancient evidence of sleep's dual nature The Transmitter Discovery of an essential sleep rhythm that appeared 300 million years ago. Centre national de la recherche scientifique (CNRS)
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