A shared neural substrate for action verbs and observed actions in human posterior parietal cortex.
A shared neural substrate for action verbs and observed actions in human posterior parietal cortex.
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DOI：
10.1126/sciadv.abb3984
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发表时间：
2020-10
期刊：
影响因子：
13.6
通讯作者：
Andersen RA
中科院分区：
文献类型：
--
作者：
Aflalo T;Zhang CY;Rosario ER;Pouratian N;Orban GA;Andersen RA
一个共同的神经基板的行动动词和视觉观察到的行动表明感觉运动的语言意义的贡献。高级感觉和运动皮层区域在处理语言的意义时被激活，但目前尚不清楚单词是否以及如何与相应的感觉运动表征共享神经基质。我们记录了人类后顶叶皮层（PPC）的单个神经元，而参与者从多个视图观看动作动词和相应的动作视频。我们发现，PPC神经元表现出一个共同的神经基板的动作动词和观察到的行动。此外，视频被编码为跨视图的不变和特异反应的混合物。动作动词引起了选择性的反应，从这些不变的和特质的神经元的一小部分，没有偏好，从而与相应的动作概念相关的各种感官表征的统计抽样。控制表明，结果不是产品的视觉形象或任意学会协会。我们的研究结果表明，语言可以激活读者的巩固的视觉体验。
A shared neural substrate for action verbs and visually observed actions suggests sensory-motor contributions to language meaning. High-level sensory and motor cortical areas are activated when processing the meaning of language, but it is unknown whether, and how, words share a neural substrate with corresponding sensorimotor representations. We recorded from single neurons in human posterior parietal cortex (PPC) while participants viewed action verbs and corresponding action videos from multiple views. We find that PPC neurons exhibit a common neural substrate for action verbs and observed actions. Further, videos were encoded with mixtures of invariant and idiosyncratic responses across views. Action verbs elicited selective responses from a fraction of these invariant and idiosyncratic neurons, without preference, thus associating with a statistical sampling of the diverse sensory representations related to the corresponding action concept. Controls indicated that the results are not the product of visual imagery or arbitrary learned associations. Our results suggest that language may activate the consolidated visual experience of the reader.
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