2020年11月20日

  听上去不好受是吧?为什么这些噪音让人如此难以忍受呢? 部分原因是大脑似乎对某些声音既有天生的警惕性,比警报声和其他尖锐的噪声 研究人员让16位受试者听了一系列声音,同时扫描他们的大脑活动,并要求他们根据声音的刺耳程度进行评价。研究人员观察到,受试者听觉皮层和杏仁核的活跃程度随着他们的评价发生了直接的变化。 听觉皮层是大脑处理声音声学特征的区域,但编码这些特征、对刺耳声音产生负反馈的区域则是杏仁核,负责……[查看全文] How We Process Horrible Sounds [A series of harsh sounds.] Not nice to listen to. But what makes such noises unbearable? Part of the answer is that the brain appears to be hardwired to be alarmed at, for example, alarms and other shrill noises. Researchers scanned the brains of 16 participants as they listened to a range of sounds, and asked them to rate the sounds from unpleasant to less unpleasant. Activity in both the auditory cortex and the amygdala varied directly with the subjects ratings. The auditory cortex is where a sounds acoustic features are processed. But it is the amygdala—the small part of the brain in charge of emotional memory—that encodes those features and triggers the negative reaction to unpleasant sounds...[full transcript] 订阅最新“科学60秒”英语新闻 不再漏掉任何一次新知 plus 练耳的机会~