In fact, the same patterns of activity we see in improvising musicians also show up during REM sleep— the phase of sleep that lets us dream.

事实上，我们在即兴演奏的音乐家身上看到的活动模式，也出现在快速眼动睡眠中。快速眼动即让我们做梦的睡眠阶段。

This may mean it takes longer to fall asleep, but studies show that the dream phase of sleep remains unaffected.

但是如果我们在睡前喝咖啡，则需要更长的时间才能入睡，但研究表明，睡眠的做梦阶段是不会受咖啡影响的。

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.

一些研究人员提出，大脑在快速动眼睡眠期会产生并巩固形成记忆和认知的神经元。