The role of coherence and cohesion in text comprehension: an event-related fMRI study
The role of coherence and cohesion in text comprehension: an event-related fMRI study
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DOI：
10.1016/s0926-6410(01)00007-6
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发表时间：
2001-06-01
期刊：
影响因子：
--
通讯作者：
von Cramon, DY
中科院分区：
文献类型：
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作者：
Ferstl, EC;von Cramon, DY
语篇处理需要推理来建立连续句子之间的连贯。在神经心理学研究和脑成像研究中，这些连贯性的建立过程被归因于右脑。另一方面，有证据表明，前额叶脑损伤会导致非失语性语言障碍，即文本水平的加工受到损害。在这项研究中，我们使用与事件相关的全头功能磁共振成像方法来评估前额叶区域和右脑对一致性建立的贡献。我们扫描了12名参与者，让他们阅读120对句子，并判断他们的连贯性。研究使用了四种条件，这四种情况是由交叉连贯和衔接(即存在词汇连接)产生的。一项行为前测证实，衔接有助于连贯的建立，而衔接阻碍了连贯中断的检测。在功能磁共振成像研究中，与物理控制任务相比，所有语言条件都会在左额外侧和颞侧区域产生激活。与非连贯句对相比，句对连贯的差异在左额正中节区、扣带后区和楔前区的连贯激活中最为明显。最后，左下前额叶区域对任务的难度很敏感，尤其是当凝聚力错误地表明连贯性时，加工成本的增加。这些结果不能为右脑在推理过程中的特殊参与提供证据。相反，他们认为左额中叶皮质在建立连贯性方面起着重要作用。(C)2001 Elsevier Science B.V.保留所有权利。
Text processing requires inferences for establishing coherence between successive sentences. In neuropsychological studies and brain imaging studies, these coherence-building processes have been ascribed to the right hemisphere. On the other hand, there is evidence for prefrontal brain damage causing non-aphasic language disorders, in which text level processes are impaired. In this study, we used an event-related, whole-head fMRI methodology to evaluate the contributions of prefrontal areas and the right hemisphere to coherence building. We scanned 12 participants while they read 120 sentence pairs and judged their coherence. Four conditions were used, resulting from crossing coherence and cohesion (i.e. the presence of a lexical connection). A behavioral pretest confirmed that cohesion aided establishing coherence, whereas it hindered the detection of coherence breaks. In the fMRI study, all language conditions yielded activation in left frontolateral and temporolateral regions, when compared to a physical control task. The differences due to coherence of the sentence pairs were most evident in larger activation for coherent as compared to incoherent sentence pairs in the left frontomedian wall, but also in posterior cingulate and precuneal regions. Finally, a left inferior prefrontal area was sensitive to the difficulty of the task, and in particular to the increase in processing costs when cohesion falsely indicated coherence. These results could not provide evidence for a special involvement of the right hemisphere during inferencing. Rather, they suggest that the left frontomedian cortex plays an important role in coherence building. (C) 2001 Elsevier Science B.V. All rights reserved.