Impaired semantic categorization during transcranial direct current stimulation of the left and right inferior parietal lobule

IF 1.2 3区心理学 Q2 LINGUISTICS Journal of Neurolinguistics Pub Date : 2022-05-01 DOI:10.1016/j.jneuroling.2022.101058

Federica Longo, Mario Braun, Florian Hutzler, Fabio Richlan

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引用次数: 1

Abstract

We investigated whether semantic knowledge is organized according to domain- or feature-dimensions during a semantic categorization task. In addition, using transcranial direct current stimulation (tDCS), we assessed whether the left or right inferior parietal lobule is differentially engaged based on these dimensions. To this end, four different tDCS electrode montage groups were employed (anodal left, cathodal left, anodal right, cathodal right). Reaction times and accuracy were recorded in response to visually presented words (living and non-living concepts with a high or low number of features). In line with our expectations, living concepts elicited faster reaction times compared with non-living concepts and concepts with a high number of features elicited faster reaction times compared with concepts with a low number of features. In addition, a general, regionally and polarity-unspecific, deteriorating effect of tDCS emerged, with stimulation slowing down reaction times compared with sham. The results are discussed in the frameworks of major theories on the organization of semantic knowledge, including the Distributed Domain-Specific Hypothesis.

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经颅直流电刺激左、右顶叶下小叶时语义分类受损

我们研究了在语义分类任务中，语义知识是根据领域维度还是特征维度组织的。此外，使用经颅直流电刺激(tDCS)，我们评估了基于这些维度的左或右顶叶下小叶是否有差异参与。为此，采用4种不同的tDCS电极蒙太奇组(左阳极、左阴极、右阳极、右阴极)。对视觉呈现的单词(有生命的和没有生命的概念，特征数多或少)的反应时间和准确性进行记录。与我们的预期一致，有生命的概念比无生命的概念引发的反应时间更快，特征数量多的概念比特征数量少的概念引发的反应时间更快。此外，tDCS出现了一种普遍的、区域性的、极性不特异性的恶化效应，与假手术相比，刺激会减慢反应时间。研究结果在语义知识组织的主要理论框架下进行了讨论，包括分布式领域特定假设。

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来源期刊

Journal of Neurolinguistics 医学-神经科学

CiteScore

3.90

自引率

5.00%

发文量

审稿时长

17.2 weeks

期刊介绍： The Journal of Neurolinguistics is an international forum for the integration of the neurosciences and language sciences. JNL provides for rapid publication of novel, peer-reviewed research into the interaction between language, communication and brain processes. The focus is on rigorous studies of an empirical or theoretical nature and which make an original contribution to our knowledge about the involvement of the nervous system in communication and its breakdowns. Contributions from neurology, communication disorders, linguistics, neuropsychology and cognitive science in general are welcome. Published articles will typically address issues relating some aspect of language or speech function to its neurological substrates with clear theoretical import. Interdisciplinary work on any aspect of the biological foundations of language and its disorders resulting from brain damage is encouraged. Studies of normal subjects, with clear reference to brain functions, are appropriate. Group-studies on well defined samples and case studies with well documented lesion or nervous system dysfunction are acceptable. The journal is open to empirical reports and review articles. Special issues on aspects of the relation between language and the structure and function of the nervous system are also welcome.