Similar neural networks respond to coherence during comprehension and production of discourse
Similar neural networks respond to coherence during comprehension and production of discourse
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类似的神经网络在理解和产生话语过程中对连贯性做出反应
DOI：
10.1101/2021.06.24.449717
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Morales M
中科院分区：
文献类型：
--
作者：
Morales M
在理解语篇时，听者使用缺省模式区与综合语义加工相关联，以构建其内容的情景模型。我们调查了当我们产生和理解话语时，类似的网络是如何参与的。在功能磁共振成像过程中，参与者谈论了一系列特定的主题，并听取了其他主题的演讲。我们测试了语篇整体连贯性的自然波动是如何预测激活的，也就是话语符合预期话题的程度。说和听的神经相关性是相似的，特别是在缺省模式区域。当听到或产生不太连贯的语音时，这一网络表现出更大的激活，反映了当话语与预期主题不一致时，心理表征的更新。相反，控制语义激活的区域表现出任务特异性效应，与听力过程中的连贯性负相关，但与产出过程中的一致性负相关。在左下前额叶皮质表现出更大激活的参与者也产生了更连贯的话语，这表明该区域在目标导向的语音内容调节中发挥了特定的作用。结果表明，在说和听过程中，语篇表征具有很强的一致性。然而，它们表明，语义控制网络在理解和生产中发挥着不同的作用。
When comprehending discourse, listeners engage default-mode regions associated with integrative semantic processing to construct a situation model of its content. We investigated how similar networks are engaged when we produce, as well as comprehend, discourse. During functional magnetic resonance imaging, participants spoke about a series of specific topics and listened to discourse on other topics. We tested how activation was predicted by natural fluctuations in the global coherence of the discourse, that is, the degree to which utterances conformed to the expected topic. The neural correlates of coherence were similar across speaking and listening, particularly in default-mode regions. This network showed greater activation when less coherent speech was heard or produced, reflecting updating of mental representations when discourse did not conform to the expected topic. In contrast, regions that exert control over semantic activation showed task-specific effects, correlating negatively with coherence during listening but not during production. Participants who showed greater activation in left inferior prefrontal cortex also produced more coherent discourse, suggesting a specific role for this region in goal-directed regulation of speech content. Results suggest strong correspondence of discourse representations during speaking and listening. However, they indicate that the semantic control network plays different roles in comprehension and production.
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