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1. The second type of sleep, known as REM-sleep(rapid-eye-movement sleep)occurs cyclically during the sleep period with rapid eye movements and frequent dream reports.
第二種睡眠，通常稱為REM睡眠。它在睡眠時周期性出現(xiàn)。這時，雙眼急促移動，并不時醒來說做了夢。

2. Rapid eye movement sleep consists of a dreaming state in which there is activation of the cortical and hippocampal electroencephalogram, rapid eye movements, and loss of muscle tone. Although REM sleep was discovered more than 50 years ago, the neuronal circuits responsible for switching between REM and non-REM sleep remain poorly understood. Here we propose a brainstem flip-flop switch, consisting of mutually inhibitory REM-off and REM-on areas in the mesopontine tegmentum. Each side contains GABA (gamma-aminobutyric acid)-ergic neurons that heavily innervate the other.
快動眼睡眠是一個包括有皮層和海馬腦電活動的睡夢狀態(tài)，可見眼球的快速運動和肌張力減低，盡管快動眼睡眠已經(jīng)被發(fā)現(xiàn)50余年了，對其與非快動眼睡眠之間的神經(jīng)回路卻知之甚少，我們用腦干觸發(fā)轉(zhuǎn)換器，包括腦橋背蓋區(qū)一個互相抑制的快動眼-關、快動眼-開區(qū)域，每側(cè)均包含高度互相支配gamma氨基丁酸能神經(jīng)元。

3. This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM sleep.
這一時期的眼球快速轉(zhuǎn)動會持續(xù)8到15分鐘稱為REM 睡眠。

4. This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM slee p.
這種迅速的眼球運動持續(xù)約 8～15 分鐘，這一階段睡眠被稱之為快速眼動睡眠。

5. This stage of sleep is called REM, which stands for rapid eye movement.
這類題提問的形式多種多樣，常見的有以下幾種

6. The brain is as active during REM (rapid eye movement) sleep when most vivid dreams occur as it is when fully awake, says Dr.
匹茲堡大學的埃里克博士說，在夢境很形象的快速動眼睡眠中，大腦和完全清醒時一樣活躍。

7. This was curious, because during so-called REM sleep (rapid eye movement), our muscles are usually paralysed.
這在當時是很新奇的，因為在所謂的REM（Rapideyemovement快速眼球運動）睡眠中，我們的肌肉通常是處于麻痹狀態(tài)的。

8. Rapid eye movement Both the REM sleep and the brain waves happen at the same time.
（反常睡眠時）眼的迅速跳動快速眼部運動睡眠和腦波同時發(fā)生。

9. REM or rapid eye movement is the stage in sleep when people typically dream.
“快速眼動（REM）”是人在夢境中一種反應。

10. Rapid Eye Movement (REM), a characteristic of deep sleep, is hard to discern.
深層睡眠的一個特征，是眼的迅速跳動（REM）很難識別。

11. You've probably heard that dreams only occur during rapid eye movement or REM sleep.
也許你聽說過只有在眼球高速運動或者快速眼動睡眠時才會做夢。

12. We also know that at seven months a fetus is dreaming, its muscles and eye movements giving the tell-tale signs of REM (or rapid eye movement) sleep and non-REM sleep.
我們還知道7個月大小的胎兒也做夢，胎兒的肌肉和眼動能清清楚楚地反映出快速眼動睡眠（REM）和非快速眼動睡眠（non-REM）信號。

13. Then REM sleep emerges, rapid eye movement sleep.
這時就進入REM快速眼動睡眠。

14. And cognitive neuroscientists have discovered that dreams and the rapid eye movement (REM) that happens while you're dreaming are linked to our ability to learn and remember.
認識神經(jīng)學家已經(jīng)發(fā)現(xiàn)，夢和你入夢時的快速眼動（REM），與我們的學習、記憶能力是相聯(lián)系的。

15. There are two kinds of sleep, Rapid Eye Movement (REM) sleep and Non-REM (NREM) sleep.
睡眠有兩種形式，分別是快速眼動（REM）睡眠和非快速眼動（NREM）睡眠。

16. Some researchers theorize that the REM, or rapid eye movement, phase of sleep is when the brain produces and consolidates neural networks for memory and cognition.
一些研究人員提出，大腦在快速動眼睡眠期會產(chǎn)生并鞏固形成記憶和認知的神經(jīng)元。

17. The results of the study add to the growing body of evidence that Rapid Eye Movement (REM) sleep is crucial to the brain's ability to lay down and consolidate memories.
此前有證據(jù)表明，眼動睡眠對大腦記憶的能力至關，而結果印證了該說法。

18. The two researchers called this Rapid Eye Movement or REM sleep. One nighttime physical activity that may actually help sleep is sex, which can have a sedating effect.
兩位研究員稱這種睡眠階段為快速眼動睡眠。性生活可能是一種對睡眠的實際幫助的晚間身體運動。

19. However, it reduces their rapid eye movement (REM) sleep, the only phase during the sleep cycle when the body recovers and prepares itself for the waking part of the day.
然而，它會減少你的快速眼動睡眠（REM），這是唯一能讓身體充分恢復、為清醒地早晨做好準備的睡眠模式。

20. Make the Sandman your best friend when you use these tips to achieve REM, or rapid eye movement sleep & and experience its restorative benefits.
當你采用下面的建議來達到深度睡眠，瞌睡蟲就是你最好的朋友，并體驗恢復健康的益處。