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首页> 外文期刊>Scientific reports. >Representational similarity analysis reveals task-dependent semantic influence of the visual word form area
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Representational similarity analysis reveals task-dependent semantic influence of the visual word form area

机译：代表性相似性分析显示了视觉字形面积的任务依赖性语义影响

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Access to semantic information of visual word forms is a key component of reading comprehension. In this study, we examined the involvement of the visual word form area (VWFA) in this process by investigating whether and how the activity patterns of the VWFA are influenced by semantic information during semantic tasks. We asked participants to perform two semantic tasks - taxonomic or thematic categorization - on visual words while obtaining the blood-oxygen-level-dependent (BOLD) fMRI responses to each word. Representational similarity analysis with four types of semantic relations (taxonomic, thematic, subjective semantic rating and word2vec) revealed that neural activity patterns of the VWFA were associated with taxonomic information only in the taxonomic task, with thematic information only in the thematic task and with the composite semantic information measured by word2vec in both semantic tasks. Furthermore, the semantic information in the VWFA cannot be explained by confounding factors including orthographic, low-level visual and phonological information. These findings provide positive evidence for the presence of both orthographic and task-relevant semantic information in the VWFA and have significant implications for the neurobiological basis of reading.
机译：访问视觉单词形式的语义信息是阅读理解的关键组成部分。在这项研究中，我们通过调查在语义任务期间是否受到语义信息的情商影响的是否影响了VWFA的活动模式以及如何影响视觉字形面积（VWFA）的参与。我们要求参与者执行两个语义任务 - 分类学或专题分类 - 在获得每个单词的血氧级相关（粗体）FMRI响应时的视觉单词。具有四种类型的语义关系（分类，专题，主观语义评级和Word2Vec）的代表性相似性分析显示，VWFA的神经活动模式仅与分类学职能相关的分类信息，仅在主题任务中具有主题信息和两个语义任务中的Word2VEC测量的复合语义信息。此外，VWFA中的语义信息不能通过混淆因素来解释，包括正交，低级视觉和语音信息。这些调查结果为VWFA中的正交和任务相关的语义信息提供了积极的证据，并对阅读的神经生理基础具有显着影响。

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