Researchers think this could be because nappers are able to stay in a lighter sleep and move through sleep stages more easily.

研究人员认为，这可能是因为小睡者能够保持较浅的睡眠，更容易度过睡眠阶段。

After that, you start the REM or " rapid eye movement" sleep stage.

之后，您开始 REM 或“快速眼动”睡眠阶段。

In addition, brain activity decreased by 30 percent during the sleep stage that the brain normally uses to recover from its daylight work.

而且大脑活动在睡眠过程中减少30%，通常大脑通过活动得到休息。

Although REM sleep is not classified as a type of deep sleep, it is only reached after the brain has passed through deep sleep stages.

REM 睡眠并不属于深度睡眠的范畴，只有在经过深度睡眠后，大脑才能进入REM 睡眠阶段。

This groggy and tired state is known as " sleep inertia" , and its strength is related to which sleep stage you are waking up out of.

此种疲惫的状态为“惰性睡眠”，惰性的强度与当时所处的睡眠阶段有关。

Well, we often wake up just out of REM sleep, and as a result see the remnants of this sleep stage.

好吧，我们经常刚从 REM 睡眠中醒来，结果看到了这个睡眠阶段的残余。

But the snooze button can do more damage than good, as you fall back asleep the body be restart its sleep cycle and enter into deeper sleep stages.

但是贪睡按钮实际上弊多于利，因为当你又睡回去，身体会从头开始睡眠周期，进入深度睡眠。

When you lay down and fall asleep at night your body goes through four stages of sleep: stages 1, 2, 3 and REM.

当您在晚上躺下入睡时， 您的身体会经历四个睡眠阶段： 第 1、2、 3 阶段和 REM。

During this sleep stage, your brain strengthens neural connections formed by the previous day's experiences and integrates them into existing networks, Dr. Robbins said.

罗宾斯博士说，在这个睡眠阶段，你的大脑会加强由前一天的经历形成的神经连接，并将它们整合到现有的网络中。

But what they do know is that it most frequently happens to children and occurs during the deepest stages of sleep, stages 3 and 4.

但他们所知道的是， 它最常发生在儿童身上，并且发生在最深的睡眠阶段， 即第 3 和第 4 阶段。

After experiencing your first and second periods of deep sleep, your body enters wakeful sleep stages, like REM sleep or light sleep, which makes you vulnerable to common sleep disruptions.

经历了第一和第二个深度睡眠期后，身体进入到了清醒的睡眠阶段，比如说快速眼动睡眠或浅睡眠，这会让你易受到常见的睡眠干扰的影响。

Instead, he had discovered the sleep stage we now call REM or rapid eye movement, a perplexing period when the sleeping brain is buzzing with activity, even though the body is in a deep slumber.

相反地，他发现了一个睡眠阶段，我们叫做REM期（快速眼动），这是一个令人费解的阶段，睡着的大脑在不断活动，即使身体几乎静止。