The butterfly effect: amplification of local changes along the temporal processing hierarchy
The butterfly effect: amplification of local changes along the temporal processing hierarchy
复制标题
蝴蝶效应：沿着时间处理层次放大局部变化
DOI：
10.1101/102590
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Uri Hasson
中科院分区：
文献类型：
--
作者：
Y. Yeshurun;Mai Nguyen;Uri Hasson
仅仅改变故事中的几个词就可以引起整个叙述的实质性变化。在真实生活的叙事过程中，大脑是如何积累和处理局部和稀疏的变化，创造出故事的独特情境模型的？最近，我们绘制了大脑中处理时间尺度的层次结构：从整合信息的早期感觉区域超过10 - 100毫秒，到整合信息的高阶区域超过数秒到数分钟。基于这一层次，我们假设，早期的感觉区域将敏感的局部变化，在文字的使用，但将有越来越多的不同的神经反应沿着加工层次的高阶区域积累和放大这些局部变化。为了验证这一假设，我们通过改变一些单词，创造了两个结构相关但解释不同的叙述。我们发现，故事之间的神经反应距离被放大，因为故事信息从低级别区域（例如早期听觉皮层）转移到高级别区域（例如楔前叶和前额叶皮层），故事之间的神经差异与区域随着时间的推移整合信息的能力高度相关。我们的研究结果提出了一种神经机制，通过这种机制，两种相似的情况变得容易区分。
Changing just a few words in a story can induce a substantial change in the overall narrative. How does the brain accumulate and process local and sparse changes, creating a unique situation model of the story, over the course of a real-life narrative? Recently, we mapped a hierarchy of processing timescales in the brain: from early sensory areas that integrate information over 10s-100s ms, to high-order areas that integrate information over many seconds to minutes. Based on this hierarchy, we hypothesize that early sensory areas would be sensitive to local changes in word use, but that there will be increasingly divergent neural responses along the processing hierarchy as higher-order areas accumulate and amplify these local changes. To test this hypothesis, we created two structurally related but interpretively distinct narratives by changing some individual words. We found that the neural response distance between the stories was amplified as story information is transferred from low-level regions (e.g. early auditory cortex) to high-level regions (e.g precuneus and prefrontal cortex) and that the neural difference between stories is highly correlated with an area’s ability to integrate information over time. Our results suggest a neural mechanism by which two similar situations become easy to distinguish.
影响因子：
2.5
作者：
Kay, Kendrick N.;Winawer, Jonathan;Wandell, Brian A.
通讯作者：
Wandell, Brian A.
影响因子：
3.7
作者：
Okada, Kayoko;Rong, Feng;Hickok, Gregory
通讯作者：
Hickok, Gregory