The influence of sentence novelty and figurativeness on brain activity.
The influence of sentence novelty and figurativeness on brain activity.
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DOI：
10.1016/j.neuropsychologia.2010.12.004
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发表时间：
2011-02
期刊：
影响因子：
2.6
通讯作者：
Hogstrom LJ
中科院分区：
文献类型：
--
作者：
Diaz MT;Barrett KT;Hogstrom LJ
左半球在语言理解和产生方面的优势是众所周知的。最近，人们检查了右半球对语言的贡献。临床、行为和神经影像学研究支持右半球参与隐喻处理。但是，对于隐喻本身是否涉及右半球，或者隐喻和文字语言之间存在差异的其他因素是否会引起右半球的参与，存在分歧。消除这些问题的歧义对于提高我们对比喻语言处理的基础知识、更准确地定义右半球如何支持语言以及提高我们理解和治疗语言障碍的能力非常重要。在这里，我们通过控制字面和隐喻句子的熟悉程度，利用功能磁共振成像（fMRI）研究了右半球在语言理解中的作用。在与事件相关的设计中，参与者查看每 4.5 至 9 秒出现的英语句子，并对其做出愉快程度的判断。所有句子都会引起传统语言脑区的激活，包括左额下回、左颞前下回和左颞中回后部。总体而言，隐喻和新颖的刺激引起了双侧额下回和左颞区的激活。此外，在右颞极，隐喻比字面句子更能引起激活。尽管我们的结果与分级显着性假设和粗编码假设部分一致，但右半球对熟悉隐喻的敏感性表明右半球的招募最受语义整合需求的影响。
The predominance of the left hemisphere in language comprehension and production is well established. More recently, the right hemisphere’s contribution to language has been examined. Clinical, behavioral, and neuroimaging research support the right hemisphere’s involvement in metaphor processing. But, there is disagreement about whether metaphors, in and of themselves, engage the right hemisphere or if other factors that vary between metaphors and literal language elicit right hemisphere engagement. It is important to disambiguate these issues to improve our basic knowledge of figurative language processing, to more precisely define how the right hemisphere supports language, and to facilitate our ability to understand and treat language impairments. Here we investigated the role of the right hemisphere in language comprehension with functional magnetic resonance imaging (fMRI) by manipulating familiarity in both literal and metaphoric sentences. In an event-related design, participants viewed English sentences that appeared every 4.5 to 9 seconds, and to which they made a pleasantness judgment. All sentences elicited activation in traditional language brain regions including left inferior frontal gyrus, left anterior inferior temporal and left posterior middle temporal gyri. Overall, metaphors and novel stimuli elicited activation in bilateral inferior frontal gyri and left temporal regions. Additionally, metaphors elicited greater activation than literal sentences in right temporal pole. Although our results are partially consistent with the graded salience hypothesis and the coarse coding hypothesis, the right hemisphere’s sensitivity to familiar metaphors suggests that right hemisphere recruitment is most influenced by semantic integration demands.
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