The organization and dissolution of semantic-conceptual knowledge: Is the 'amodal hub' the only plausible model?
The organization and dissolution of semantic-conceptual knowledge: Is the 'amodal hub' the only plausible model?
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DOI：
10.1016/j.bandc.2010.12.001
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发表时间：
2011-04-01
影响因子：
2.5
通讯作者：
Gainotti, Guido
中科院分区：
文献类型：
--
作者：
Gainotti, Guido
近年来，概念活动的解剖学和功能基础引起了越来越多的关注。特别是帕特森和兰邦-拉尔夫提出，在颞叶的前部存在一种机制，（"非模态语义中枢“）支持所有模态和所有语义类别的语义表征的交互激活。本文的目的是讨论这个模型，反对”非模态“语义中枢的概念，因为我们认为，与Damasio的“高阶收敛区”结构相一致，在知觉信息和概念表征之间存在连续体，而“非模态”帐户仅将知觉信息视为抽象语义知识可以被激活的通道。根据我们的模型，语义组织可以更好地解释了两个正交的高阶收敛系统，涉及，一方面，右半球与左半球，另一方面，腹侧与背侧处理路径。这个模型假定概念表征可能主要基于右半球的知觉活动和左脑的语言中介。它还假设，基于高度加工的视觉信息与其他感知数据（主要涉及生活类别）的融合的概念知识可能在颞叶的前部双侧表示，而基于视觉数据与动作图式（即动作，身体部位和人工制品的知识）的整合的知识可能更多地表示在左额颞顶叶区域。(C)2010年爱思唯尔公司All rights reserved.
In recent years, the anatomical and functional bases of conceptual activity have attracted a growing interest. In particular, Patterson and Lambon-Ralph have proposed the existence, in the anterior parts of the temporal lobes, of a mechanism (the 'amodal semantic hub') supporting the interactive activation of semantic representations in all modalities and for all semantic categories.The aim of then present paper is to discuss this model, arguing against the notion of an 'amodal' semantic hub, because we maintain, in agreement with the Damasio's construct of 'higher-order convergence zone', that a continuum exists between perceptual information and conceptual representations, whereas the 'amodal' account views perceptual informations only as a channel through which abstract semantic knowledge can be activated. According to our model, semantic organization can be better explained by two orthogonal higher-order convergence systems, concerning, on one hand, the right vs. left hemisphere and, on the other hand, the ventral vs. dorsal processing pathways. This model posits that conceptual representations may be mainly based upon perceptual activities in the right hemisphere and upon verbal mediation in the left side of the brain. It also assumes that conceptual knowledge based on the convergence of highly processed visual information with other perceptual data (and mainly concerning living categories) may be bilaterally represented in the anterior parts of the temporal lobes, whereas knowledge based on the integration of visual data with action schemata (namely knowledge of actions, body parts and artefacts) may be more represented in the left fronto-temporo-parietal areas. (C) 2010 Elsevier Inc. All rights reserved.