Abstract Various sentences can describe the same event from different perspectives (e.g., “John kicked Mike.” and “Mike was kicked by John.”). Humans can easily verify propositional equivalence of these sentences, but the underlying brain mechanisms are unclear. The present study examined whether the perspective taking system is involved in the verification of propositional equivalence between two sentences having different grammatical subjects, using a functional magnetic resonance imaging. Participants were required to observe a picture and to verbalize it silently by encoding a visually cued person as the grammatical subject. Then, we presented a sentence whose grammatical subject was either congruent or incongruent with the previous one. Participants judged whether the meanings of these sentences were matched. Comparing the incongruent condition to the congruent condition, we found increased activation in the regions involved in perspective taking of another person. This suggests that perspective switching takes place in the incongruent condition.

中文翻译：

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语法主题的不一致激活了句子验证任务中涉及观点的大脑区域

摘要 不同的句子可以从不同的角度描述同一事件（例如，“John kicked Mike.”和“Mike was kicked by John.”）。人类可以很容易地验证这些句子的命题等价，但潜在的大脑机制尚不清楚。本研究使用功能磁共振成像检查了观点采择系统是否参与了具有不同语法主题的两个句子之间的命题等价的验证。参与者被要求观察一张图片，并通过将一个视觉提示的人编码为语法主题来默默地用语言表达它。然后，我们提出了一个句子，其语法主语与前一个一致或不一致。参与者判断这些句子的含义是否匹配。将不一致的条件与一致的条件进行比较，我们发现与另一个人的观点不同有关的区域的激活增加。这表明视角转换发生在不一致的条件下。