Spatiotemporal Neural Network for Sublexical Information Processing: An Intracranial SEEG Study.

IF 4.4 2区 医学 Q1 NEUROSCIENCES Journal of Neuroscience Pub Date : 2024-11-06 DOI:10.1523/JNEUROSCI.0717-24.2024
Chunyu Zhao, Yi Liu, Jiahong Zeng, Xiangqi Luo, Weijin Sun, Guoming Luan, Yuxin Liu, Yumei Zhang, Gaofeng Shi, Yuguang Guan, Zaizhu Han
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Abstract

Words offer a unique opportunity to separate the processing mechanisms of object subcomponents from those of the whole object, because the phonological or semantic information provided by the word subcomponents (i.e., sublexical information) can conflict with that provided by the whole word (i.e., lexical information). Previous studies have revealed some of the specific brain regions and temporal information involved in sublexical information processing. However, a comprehensive spatiotemporal neural network for sublexical processing remains to be fully elucidated due to the low temporal or spatial resolutions of previous neuroimaging studies. In this study, we recorded stereoelectroencephalography signals with high spatial and temporal resolutions from a large sample of 39 epilepsy patients (both sexes) during a Chinese character oral reading task. We explored the activated brain regions and their connectivity related to three sublexical effects: phonological regularity (whether the whole character's pronunciation aligns with its phonetic radical), phonological consistency (whether characters with the same phonetic radical share the same pronunciation), and semantic transparency (whether the whole character's meaning aligns with its semantic radical). The results revealed that sublexical effects existed in the inferior frontal gyrus, precentral and postcentral gyri, temporal lobe, and middle occipital gyrus. Additionally, connectivity from the middle occipital gyrus to the postcentral gyrus and from postcentral gyrus to the fusiform gyrus was associated with the sublexical effects. These findings provide valuable insights into the spatiotemporal dynamics of sublexical processing and object recognition in the brain.

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用于副词汇信息处理的时空神经网络:颅内 SEEG 研究。
单词提供了一个独特的机会,可以将对象子成分的加工机制与整个对象的加工机制分开,因为单词子成分提供的语音或语义信息(即亚词汇信息)可能与整个单词提供的信息(即词汇信息)相冲突。以往的研究已经揭示了次词汇信息处理所涉及的一些特定脑区和时间信息。然而,由于之前的神经影像学研究的时间或空间分辨率较低,用于次词汇处理的全面时空神经网络仍有待全面阐明。在本研究中,我们记录了 39 名癫痫患者(男女均有)在汉字口语阅读任务中的高时空分辨率立体脑电图(SEEG)信号。我们探究了与三种亚词汇效应相关的激活脑区及其连通性:语音规则性(整个汉字的发音是否与其语音部首一致)、语音一致性(具有相同语音部首的汉字是否具有相同的发音)和语义透明度(整个汉字的意义是否与其语义部首一致)。结果显示,在额下回、中央前回和中央后回、颞叶和枕中回存在亚词汇效应。此外,从枕中回到中央后回以及从中央后回到纺锤形回的连接也与亚词汇效应有关。这些发现为了解大脑中次词汇加工和物体识别的时空动态提供了宝贵的见解。 意义声明 阐明次词汇加工背后错综复杂的神经机制对于了解人脑中语言理解和物体识别的复杂性至关重要。本研究采用颅内立体脑电图(SEEG)记录来研究汉字阅读任务中次词汇处理的时空动态。我们构建了亚词汇处理的神经网络,并描绘了其在不同脑区的时序。此外,我们还确定了该网络中的信息流,并观察了其在阅读包含不同次词汇信息的汉字时的变化。这些研究结果不仅加深了我们对控制次词汇处理的大脑机制的理解,还为更广泛的物体识别过程框架提供了启示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Neuroscience
Journal of Neuroscience 医学-神经科学
CiteScore
9.30
自引率
3.80%
发文量
1164
审稿时长
12 months
期刊介绍: JNeurosci (ISSN 0270-6474) is an official journal of the Society for Neuroscience. It is published weekly by the Society, fifty weeks a year, one volume a year. JNeurosci publishes papers on a broad range of topics of general interest to those working on the nervous system. Authors now have an Open Choice option for their published articles
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