科学家发现人在疲惫时部分脑细胞会打上一小会儿盹。他们认为这种现象可以解释为何我们在极度疲惫时脑子常常会“短路”，比如正想找某样东西，突然又忘了自己要找什么了。 这就是微睡眠。
开车时出现微睡眠状况极易发生意外。
The sleeping driver is at very high risk for having an accident during a microsleep.
她说，一般认为，造成微睡眠多半像汽车驾驶司机驾车时打瞌睡。
She said periods of micro sleep were thought to be the most likely cause of people falling asleep at the wheel while driving.
我们通过脑电图(EEGs)看到，即使我们清醒时候，仍存在短暂‘微睡眠’。
We have seen with EEGs that even while we are awake, we can experience shorts periods of 'micro sleep'.
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