Distinct brain systems for processing concrete and abstract concepts
Distinct brain systems for processing concrete and abstract concepts
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DOI：
10.1162/0898929054021102
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发表时间：
2005-06-01
影响因子：
3.2
通讯作者：
Medler, DA
中科院分区：
文献类型：
--
作者：
Binder, JR;Westbury, CF;Medler, DA
词的形象性和具体性的行为和神经生理学效应仍然是认知神经科学的核心兴趣，可以为理解大脑如何处理概念知识提供重要线索。我们使用事件相关功能磁共振成像检查这些影响，同时参与者识别具体和抽象的单词。相对于非词，具体的和抽象的话都激活了左偏网络的多模态关联领域先前与口头语义处理。左侧颞叶的区域同样被两种类型的单词激活，而包括角回和背侧前额叶皮层在内的双侧区域则被具体的单词激活。相对于具体的单词，抽象的单词激活左下额叶区域先前与语音和言语工作记忆过程。结果表明，重叠，但部分不同的神经系统处理具体和抽象的概念，在具体的文字处理，和抽象概念的处理几乎完全由左半球的双边协会领域的参与更大。
Behavioral and neurophysiological effects of word image-ability and concreteness remain a topic of central interest in cognitive neuroscience and could provide essential clues for understanding how the brain processes conceptual knowledge. We examined these effects using event-related functional magnetic resonance imaging while participants identified concrete and abstract words. Relative to nonwords, concrete and abstract words both activated a left-lateralized network of multimodal association areas previously linked with verbal semantic processing. Areas in the left lateral temporal lobe were equally activated by both word types, whereas bilateral regions including the angular gyrus and the dorsal prefrontal cortex were more strongly engaged by concrete words. Relative to concrete words, abstract words activated left inferior frontal regions previously linked with phonological and verbal working memory processes. The results show overlapping but partly distinct neural systems for processing concrete and abstract concepts, with greater involvement of bilateral association areas during concrete word processing, and processing of abstract concepts almost exclusively by the left hemisphere.