Spatiotemporal dynamics during processing of abstract and concrete verbs: An ERP study
Spatiotemporal dynamics during processing of abstract and concrete verbs: An ERP study
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DOI：
10.1016/j.neuropsychologia.2014.06.019
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发表时间：
2014-08-01
期刊：
影响因子：
2.6
通讯作者：
Avanzini, Pietro
中科院分区：
文献类型：
--
作者：
Dalla Volta, Riccardo;Fabbri-Destro, Maddalena;Avanzini, Pietro
不同的帐户已被提出来解释概念表征的性质。传统的解释认为，概念是独立于知觉和运动脑系统的抽象心理实体。虽然大量的研究支持感觉运动区参与具体的语言处理，但在考虑抽象语言时，这种参与还远远没有建立起来。本研究探讨抽象和具体动词的加工，通过调查的时空动态诱发反应的高密度脑电图，而被试执行的语义决策任务。此外，还收集了相同刺激组的RT。在早期和晚期的时间间隔，ERP头皮地形显着不同，根据词的类别。具体动词参与顶叶-额叶网络的行动，根据隐含的身体效应。与此相反，抽象动词招募主要是运动系统以外的额叶区域，这表明这一类的非运动语义处理。此外，与行动观察中的报道不同，与具体动词呈现相关的顶叶募集紧随额叶募集。目前的研究结果表明，动作词的语义是植根于感觉运动系统，提供了一个身体效应器是指定的，而抽象概念的表征不能很容易地解释一个运动的实施。(C)2014作者爱思唯尔有限公司出版
Different accounts have been proposed to explain the nature of concept representations. Embodied accounts claim a key involvement of sensory-motor systems during semantic processing while more traditional accounts posit that concepts are abstract mental entities independent of perceptual and motor brain systems. While the involvement of sensory-motor areas in concrete language processing is supported by a large number of studies, this involvement is far from being established when considering abstract language. The present study addressed abstract and concrete verb processing, by investigating the spatiotemporal dynamics of evoked responses by means of high density EEG while participants performed a semantic decision task. In addition, RTs to the same set of stimuli were collected. In both early and late time intervals, ERP scalp topography significantly differed according to word categories. Concrete verbs showed involvement of parieto-frontal networks for action, according to the implied body effector. In contrast, abstract verbs recruited mostly frontal regions outside the motor system, suggesting a non-motor semantic processing for this category. In addition, differently from what has been reported during action observation, the parietal recruitment related to concrete verbs presentation followed the frontal one. The present findings suggest that action word semantic is grounded in sensory-motor systems, provided a bodily effector is specified, while abstract concepts' representation cannot be easily explained by a motor embodiment. (C) 2014 The Authors. Published by Elsevier Ltd.