假如你发现某段音乐一直在脑中不断重复，这就是所谓的“耳虫上脑”。耳虫现象通常发生在白天，但近期科学家发现，睡觉时耳虫也会在你脑中开启单曲循环模式，影响睡眠。
Were all familiar with songs getting stuck in our head while were awake, but it turns out this can happen during sleep as well. A new study investigating the phenomenon indicates that earworms invading our brains at night could cause problems in getting to sleep and staying asleep.
大家在清醒时应该都有过歌曲旋律在大脑中挥之不去的历程，但事实证明，这种“耳虫”现象在睡觉时也会出现。针对这一现象的新研究表明，夜里“入侵”大脑的耳虫或许会致使睡眠问题，叫人睡不安稳。
Our brains continue to process music even when none is playing, including apparently while we are asleep, says neuroscientist Michael Scullin from Baylor University.
贝勒大学的神经科学家迈克尔·斯卡林说：即便外面没播放音乐，大家的大脑也会继续处置音乐，包含睡觉的时候。”
He and colleagues used surveys of 199 people, as well as a sleep lab test involving 50 volunteers, to measure how listening to music before bedtime affects sleep. In particular, the team focused on catchy earworms, technically known as involuntary musical imagery.
为了衡量睡前听音乐对睡眠的影响，斯卡林和同事们调查了199个人，并对50名志愿者拓展了睡眠实验。研究小组特别关注所谓的洗脑神曲，学名叫作无意识音像。
In the survey part of the study, participants who frequently listened to music during the day were more likely to report persistent nighttime earworms, which then had a negative effect on sleep quality through the night.
调查发现，白天常常听音乐的参与者更大概在夜里“耳虫上脑”，而夜间耳虫会对一整晚的睡眠水平导致负面影响。
For the lab test, individuals were played instrumental or standard versions of Shake It Off by Taylor Swift, Call Me Maybe by Carly Rae Jepsen, and Dont STOP Believin by Journey. Polysomnography tests were used to measure subsequent sleep quality.
在实验室测试中，研究职员为参与者播放了泰勒·斯威夫特的《摆脱》、卡莉·雷·杰普森的《打电话给我》和Journey乐队的《不要舍弃信念》，并用多导睡眠图来测评他们下面的睡眠水平。
Earworms were reported throughout the night by participants, with those catching an earworm taking longer to fall asleep, spending more time in the light stages of sleep, and waking up more times during the night.
据参与者报告，一整晚都有耳虫现象出现，那些耳虫上脑的人需要更长期才能入睡，浅睡眠时间更长，而且夜里醒来的次数更多。
Surprisingly, the instrumental versions of the songs caused about twice as many earworms than the versions with vocals.
让人惊讶的是，器乐版本的歌曲引发的耳虫现象次数是人声演唱版本的两倍左右，致使的睡眠问题也更多。
We thought that people would have earworms at bedtime when they were trying to fall asleep, but we certainly didnt know that people would report regularly waking up from sleep with an earworm, says Scullin. But we saw that in both the survey and experimental study.
斯卡林说：“大家原以为，大家在试图入睡时会被耳虫困扰，但大家不了解，大家在夜里会时常被耳虫吵醒。但大家从调查和实验中都发现了这一点。”
Brain scans showed more slow oscillations during sleep in the people who reported getting an earworm – a sign of memory reactivation. The brain region involved, the primary audio cortex, is also linked to earworm processing when people are awake.
大脑扫描显示，自称遭遇耳虫困扰的人在睡眠期间大脑出现更多慢速振动，这是记忆被重新激活的迹象。所涉及的大脑地区是初级听觉皮层，这也是大家清醒时大脑处置耳虫的有关地区。
Past studies have linked late-night music listening with better sleep in those with insomnia, perhaps because it can relax the body. The researchers behind the new study suggest that actually it might be worse for our sleep – that even after the tunes sTOP, our brains continue to process them for several hours.
过去的研究曾将深夜听音乐与改变失眠者的睡眠水平联系在一块，这可能是由于听音乐可以让身体放松。这项新研究背后的研究职员指出，事实上，睡前听音乐可能对大家的睡眠更不利，由于即便在曲子停止播放后，大家的大脑仍会花数个小时继续对其进行处置。
Scullin suggests avoiding listening to music right before bed to limit the chance of a catchy tune taking hold in our minds. Engaging in some other cognitive activity before sleeping, like making a list of jobs for the next day, might also help clear the mind, Scullin says.
斯卡林建议尽可能别在睡前听音乐，以免那些朗朗上口的旋律占据大家的脑海。斯卡林指出，在睡觉前从事其他的一些认知活动，譬如列出第二天的工作清单，也会能够帮助理清思绪。
Everyone knows that music listening feels good, says Scullin. Adolescents and young adults routinely listen to music near bedtime. But sometimes you can have too much of a good thing.
斯卡林说：“大伙都了解听音乐的感觉非常不错。青少年和青年会习惯性地在睡前听音乐。但有时好事太多反变坏事。”
The more you listen to music, the more likely you are to catch an earworm that wont go away at bedtime. When that happens, chances are your sleep is going to suffer.
“你听的音乐越多，你就越可能在睡觉时遭遇耳虫。这样的情况发生时，你的睡眠或许会遭到影响。”
