Tracking real-time neural activation of conceptual knowledge using single-trial event-related potentials
Tracking real-time neural activation of conceptual knowledge using single-trial event-related potentials
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DOI：
10.1016/j.neuropsychologia.2011.01.003
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发表时间：
2011-04-01
期刊：
影响因子：
2.6
通讯作者：
Amsel, Ben D.
中科院分区：
文献类型：
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作者：
Amsel, Ben D.
可以对分类为不同类型的知识(例如，视觉的、功能的、听觉的)的经验式导出的语义特征规范求和，以创建每种知识类型的特征数量计数。初步证据表明，在语言理解过程中可能会吸收几种这样的知识类型。本研究提供了对几种知识类型对实时神经活动影响的时间过程和强度的更详细的理解。将线性混合效应模型应用于207个视觉呈现的具体单词的单次试验事件相关电位，测量的是特征总数(语义丰富度)、可形象性以及视觉运动、颜色、视觉形式、气味、味道、声音和功能特征的数目。多个特征类型的显著影响发生在200ms之前，这表明在语言理解过程中词形和概念知识的并行神经计算。功能和视觉运动特征对神经活动的影响最为显著，强调了动作相关知识在计算词义中的重要性。这些效应的动态时间进程和地形图与一个灵活的概念系统最为一致，在这个概念系统中，在情态和情态上皮质中对表征的时间动态招募是构成大脑中词义计算的一系列过程的关键元素。(C)2011爱思唯尔有限公司。保留所有权利。
Empirically derived semantic feature norms categorized into different types of knowledge (e.g., visual, functional, auditory) can be summed to create number-of-feature counts per knowledge type. Initial evidence suggests several such knowledge types may be recruited during language comprehension. The present study provides a more detailed understanding of the timecourse and intensity of influence of several such knowledge types on real-time neural activity. A linear mixed-effects model was applied to single trial event-related potentials for 207 visually presented concrete words measured on total number of features (semantic richness), imageability, and number of visual motion, color, visual form, smell, taste, sound, and function features. Significant influences of multiple feature types occurred before 200 ms, suggesting parallel neural computation of word form and conceptual knowledge during language comprehension. Function and visual motion features most prominently influenced neural activity, underscoring the importance of action-related knowledge in computing word meaning. The dynamic time courses and topographies of these effects are most consistent with a flexible conceptual system wherein temporally dynamic recruitment of representations in modal and supramodal cortex are a crucial element of the constellation of processes constituting word meaning computation in the brain. (C) 2011 Elsevier Ltd. All rights reserved.