Modality independence of word comprehension
Modality independence of word comprehension
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DOI：
10.1002/hbm.10054
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发表时间：
2002-08-01
影响因子：
4.8
通讯作者：
Mesulam, MM
中科院分区：
文献类型：
--
作者：
Booth, JR;Burman, DD;Mesulam, MM
功能磁共振成像（fMRI）被用来检查的功能解剖的文字理解的听觉和视觉形式的介绍。我们要求我们的受试者确定单词对是否在语义上相关联（例如，桌子，椅子）并将其与参考任务进行比较，在参考任务中，他们被要求判断单词对是否押韵（例如，银行，坦克）。这一比较表明，任务特定的和独立于模态的激活语义处理的异模态皮层的左额下回（BA 46，47）和左颞中回（BA 21）。在梭状回（BA 37）中，书写单词也有模态特异性激活，在上级颞回（BA 22）中，口语单词也有模态特异性激活。我们的研究结果是一致的假设，即词形识别（词汇编码）发生在单峰皮层和异模态的大脑区域的前部和后部的语言网络组件的辅助词的理解（语义解码）。(C)2002 Wiley-Liss，Inc.
Functional magnetic resonance imaging (fMRI) was used to examine the functional anatomy of word comprehension in the auditory and visual modalities of presentation. We asked our subjects to determine if word pairs were semantically associated (e.g., table, chair) and compared this to a reference task where they were asked to judge whether word pairs rhymed (e.g., bank, tank). This comparison showed task-specific and modality-independent activation for semantic processing in the heteromodal cortices of the left inferior frontal gyrus (BA 46, 47) and left middle temporal gyrus (BA 21). There were also modality-specific activations in the fusiform gyrus (BA 37) for written words and in the superior temporal gyrus (BA 22) for spoken words. Our findings are consistent with the hypothesis that word form recognition (lexical encoding) occurs in unimodal cortices and that heteromodal brain regions in the anterior as well as posterior components of the language network subserve word comprehension (semantic decoding). (C) 2002 Wiley-Liss, Inc.