Perceived Communicative Context and Emotional Content Amplify Visual Word Processing in the Fusiform Gyrus
Perceived Communicative Context and Emotional Content Amplify Visual Word Processing in the Fusiform Gyrus
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DOI：
10.1523/jneurosci.3346-14.2015
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发表时间：
2015-04
期刊：
影响因子：
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通讯作者：
Sebastian Schindler;Martin Wegrzyn;I. Steppacher;J. Kissler
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文献类型：
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作者：
Sebastian Schindler;Martin Wegrzyn;I. Steppacher;J. Kissler
语言陈述的个人意义取决于其交际语境。然而，在神经科学研究中很少考虑到这一点。在这里，我们调查如何暗示来源的单个单词语句改变他们的皮层处理。参与者的大脑事件相关电位被记录下来，以响应由积极，消极和中性特质形容词组成的相同单词流，这些形容词表示来自人类的个人特质反馈或由计算机随机生成。结果表明，感知发送者的强烈影响。无论内容如何，从人类接收反馈的概念增强了所有组件，从P2开始，包括早期后负波（EPN），P3和晚期正电位（LPP）。此外，“人类发送者”的负反馈引起更大的EPN，而正反馈通常引起更大的LPP。源估计显示的差异，“间”的视觉领域，特别是双边梭状回。同样，情感内容增强了这些区域的活动。这些结果表明，即使是隐含的发送者身份的变化，在看似现实的沟通环境中的单个单词的处理，放大他们在视觉大脑的处理。这表明动机性注意的概念从刺激意义扩展到对语境相关性的同时评价。最后，与情绪处理的不同阶段相一致，至少在被认为是社会性的环境中，人类最初会对负面内容产生警觉，但后来会更强烈地处理被认为是积极反馈的内容。
The personal significance of a language statement depends on its communicative context. However, this is rarely taken into account in neuroscience studies. Here, we investigate how the implied source of single word statements alters their cortical processing. Participants' brain event-related potentials were recorded in response to identical word streams consisting of positive, negative, and neutral trait adjectives stated to either represent personal trait feedback from a human or to be randomly generated by a computer. Results showed a strong impact of perceived sender. Regardless of content, the notion of receiving feedback from a human enhanced all components, starting with the P2 and encompassing early posterior negativity (EPN), P3, and the late positive potential (LPP). Moreover, negative feedback by the “human sender” elicited a larger EPN, whereas positive feedback generally induced a larger LPP. Source estimations revealed differences between “senders” in visual areas, particularly the bilateral fusiform gyri. Likewise, emotional content enhanced activity in these areas. These results specify how even implied sender identity changes the processing of single words in seemingly realistic communicative settings, amplifying their processing in the visual brain. This suggests that the concept of motivated attention extends from stimulus significance to simultaneous appraisal of contextual relevance. Finally, consistent with distinct stages of emotional processing, at least in contexts perceived as social, humans are initially alerted to negative content, but later process what is perceived as positive feedback more intensely.