Spatiotemporal dynamics of orthographic and lexical processing in the ventral visual pathway.

Spatiotemporal dynamics of orthographic and lexical processing in the ventral visual pathway.
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腹侧视觉通路中正字法和词汇加工的时空动态。

DOI:
10.1038/s41562-020-00982-w
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发表时间:
2021-03
影响因子:
29.9
通讯作者:
Tandon, Nitin
Tandon, Nitin
中科院分区:
心理学1区
文献类型:
--
作者:
Woolnough, Oscar;Donos, Cristian;Rollo, Patrick S.;Forseth, Kiefer J.;Lakretz, Yair;Crone, Nathan E.;Fischer-Baum, Simon;Dehaene, Stanislas;Tandon, Nitin

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阅读是一个快速的分布式过程,涉及腹侧视觉流的多个组成部分。为了了解使我们能够识别书面文字的神经成分及其相互作用,我们在一大群人中进行了直接颅内记录。这使我们能够在整个左腹侧枕颞叶皮层中分离出视觉单词识别的时空动力学。我们发现,中梭状皮质是第一个对词汇性敏感的大脑区域,先于传统的视觉词形区。其激活的幅度和持续时间由自然语言的统计数据驱动。有关词汇性和词频的信息从该区域向后传播到视觉词形区域和早期视觉皮层,这些区域虽然较早活跃,但后来对单词表现出敏感性。此外,对该区域的直接电刺激导致阅读停滞,进一步说明其在阅读中的关键作用。这种独特的敏感性,中梭状皮质的亚词汇和词汇的特点点,它的核心作用,作为正字法词汇-长期记忆表征的视觉单词的形式。
Reading is a rapid, distributed process that engages multiple components of the ventral visual stream. To understand the neural constituents and their interactions that allow us to identify written words, we performed direct intracranial recordings in a large cohort of humans. This allowed us to isolate the spatiotemporal dynamics of visual word recognition across the entire left ventral occipitotemporal cortex. We found that mid-fusiform cortex is the first brain region sensitive to lexicality, preceding the traditional visual word form area. The magnitude and duration of its activation are driven by the statistics of natural language. Information regarding lexicality and word frequency propagates posteriorly from this region to visual word form regions and to earlier visual cortex, which, while active earlier, show sensitivity to words later. Further, direct electrical stimulation of this region results in reading arrest, further illustrating its crucial role in reading. This unique sensitivity of mid-fusiform cortex to sub-lexical and lexical characteristics points to its central role as the orthographic lexicon - the long-term memory representations of visual word forms.
DOI: 10.1006/nimg.2000.0595
发表时间: 2000-06-01
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