Neural Correlates of Temporal Presentness in the Precuneus: A Cross-linguistic fMRI Study based on Speech Stimuli
Neural Correlates of Temporal Presentness in the Precuneus: A Cross-linguistic fMRI Study based on Speech Stimuli
复制标题
楔前叶时间存在的神经相关性：基于言语刺激的跨语言功能磁共振研究
DOI：
10.1093/cercor/bhaa307
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Kitazawa S
中科院分区：
文献类型：
--
作者：
Tang L;Takahashi T;Shimada T;Komachi M;Imanishi N;Nishiyama Y;Iida T;Otsu Y;Kitazawa S
任何事件在时间上的位置可以是现在、过去或未来。这种时间区分在我们的日常对话中至关重要，但人类大脑如何区分过去、现在和未来仍然是一个谜。为了解决这个问题，我们寻找了现在性、过去性和未来性的神经相关性，当我们听到“现在下雨了”、“昨天下雨了”或“明天会下雨”等句子时，这些神经相关性都会被自动唤起。在这里，我们表明，句子，唤起“现在”激活双边楔前叶更强烈地比那些唤起“过去”或“未来”。有趣的是，这种对比在日语、英语和汉语的母语使用者中是共享的，这些语言在动词时态系统上有很大的差异。结果表明，楔前叶作为一个关键区域，提供了我们的时间知觉的起源（即现在），而不管跨语言的时态系统的差异。
The position of any event in time could be in the present, past, or future. This temporal discrimination is vitally important in our daily conversations, but it remains elusive how the human brain distinguishes among the past, present, and future. To address this issue, we searched for neural correlates of presentness, pastness, and futurity, each of which is automatically evoked when we hear sentences such as “it is raining now,” “it rained yesterday,” or “it will rain tomorrow.” Here, we show that sentences that evoked “presentness” activated the bilateral precuneus more strongly than those that evoked “pastness” or “futurity.” Interestingly, this contrast was shared across native speakers of Japanese, English, and Chinese languages, which vary considerably in their verb tense systems. The results suggest that the precuneus serves as a key region that provides the origin (that is, the Now) of our time perception irrespective of differences in tense systems across languages.