Cortical mechanisms involved in the processing of verbs: An fMRI study
Cortical mechanisms involved in the processing of verbs: An fMRI study
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DOI：
10.1162/jocn.2006.18.8.1304
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发表时间：
2006-08-01
影响因子：
3.2
通讯作者：
Kawashima, Ryuta
中科院分区：
文献类型：
--
作者：
Yokoyama, Satoru;Miyamoto, Tadao;Kawashima, Ryuta
在这项研究中，我们对动词加工的两个方面进行了探究：第一，动词的加工是否与名词不同；第二，动词形态是如何被加工的。为此，我们利用功能性磁共振成像技术比较了日语中三种类型的词汇加工：名词加工、无标记的主动态动词加工以及屈折变化的被动态动词加工。28名健康受试者被展示一个词汇项目，并被要求判断所呈现的项目是否是一个合法的单词。尽管所有三种条件都激活了双侧额下回、枕叶、左侧颞中回和颞下回皮质，但我们发现每种条件的激活程度存在差异。动词在左侧颞中回引发的激活比名词更强，屈折变化的动词在左侧额下回比无标记动词显示出更强的激活。这项研究表明，尽管动词与名词基本上是在相同的皮质网络中进行加工的，但由于词汇语义加工所涉及的认知需求，名词和动词引发的激活程度不同。此外，这项研究还表明左侧额下回皮质与动词屈折形态的加工有关。
In this study, we investigated two aspects of verb processing: first, whether verbs are processed differently from nouns; and second, how verbal morphology is processed. For this purpose, we used functional magnetic resonance imaging to compare three types of lexical processing in Japanese: the processing of nouns, unmarked active verbs, and inflected passive verbs. Twenty-eight healthy subjects were shown a lexical item and asked to judge whether the presented item was a legal word. Although all three conditions activated the bilateral inferior frontal, occipital, the left middle, and inferior temporal cortices, we found differences in the degree of activation for each condition. Verbs elicited greater activation in the left middle temporal gyrus than nouns, and inflected verbs showed greater activation in the left inferior frontal gyrus than unmarked verbs. This study demonstrates that although verbs are basically processed in the same cortical network as nouns, nouns and verbs elicit different degrees of activation due to the cognitive demands involved in lexical semantic processing. Furthermore, this study also shows that the left inferior frontal cortex is related to the processing of verbal inflectional morphology.