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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Common scale-invariant patterns of sleep-wake transitions across mammalian species.
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Common scale-invariant patterns of sleep-wake transitions across mammalian species.

机译：跨哺乳动物物种的睡眠-觉醒转换的常见尺度不变模式。

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摘要

Although mammals of different species have different sleep patterns, brief sleep-wake transitions commonly are observed across species and appear to occur randomly throughout the sleeping period. The dynamical patterns and functions of these brief awakenings from sleep are not well understood, and they often are viewed as disruptions (random or pathologic) of the sleep process. In this article, we hypothesize that brief awakenings from sleep may reflect aspects of the endogenous sleep control mechanism and thus may exhibit certain robust dynamical patterns across species. We analyze sleep recordings from mice, rats, cats, and humans, and we compare the distributions of sleep and wake episode durations. For all four species, we find that durations of brief wake episodes during the sleep period exhibit a scale-free power-law behavior with an exponent alpha that remains the same for all species (alpha approximately equal to 2.2). In contrast, sleep episode durations for all four species follow exponentialdistributions with characteristic time scales, which change across species in relation to body mass and metabolic rate. Our findings suggest common dynamical features of brief awakenings and sleep durations across species and may provide insights into the dynamics of the neural circuits controlling sleep.
机译：尽管不同物种的哺乳动物具有不同的睡眠模式，但通常在整个物种中观察到短暂的睡眠-觉醒过渡，并且似乎在整个睡眠期间随机发生。这些短暂的从睡眠中唤醒的动力学模式和功能尚未得到很好的理解，它们通常被视为睡眠过程的中断（随机或病理性）。在本文中，我们假设从睡眠中短暂唤醒可能反映了内源性睡眠控制机制的各个方面，因此可能在物种间表现出某些强大的动力学模式。我们分析了小鼠，大鼠，猫和人类的睡眠记录，并比较了睡眠和唤醒事件持续时间的分布。对于所有四个物种，我们发现在睡眠期间短暂唤醒事件的持续时间表现出无标度的幂律行为，并且所有物种的指数α均相同（α大约等于2.2）。相比之下，所有四个物种的睡眠发作持续时间均遵循具有特征性时标的指数分布，该分布随物种的体重和代谢率而变化。我们的研究结果表明短暂觉醒和整个物种的睡眠时间的共同动力学特征，并可能提供控制睡眠的神经回路动力学的见解。

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