Impact of modality and linguistic complexity during reading and listening tasks
Impact of modality and linguistic complexity during reading and listening tasks
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DOI：
10.1016/j.neuroimage.2006.06.067
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发表时间：
2007-01-15
期刊：
影响因子：
5.7
通讯作者：
Tzourio-Mazoyer, N.
中科院分区：
文献类型：
--
作者：
Jobard, G.;Vigneau, M.;Tzourio-Mazoyer, N.
阅读和理解通常被认为是语言认知能力的不同表现。在这项研究中，我们感兴趣的是表征的具体贡献的输入模态和语言复杂性的神经网络参与时，受试者理解语言。我们进行了一项功能磁共振成像研究，在此期间，10名右撇子男性受试者必须在不同的运行中阅读和倾听单词，句子和文本。通过比较阅读和听力任务，我们能够表明，特定模态所专门招募的大脑区域被限制在与任务相关的单峰和联想单峰皮层，这表明任务所需的更高认知过程可能是两种模态所共有的。这些认知过程包括一个共同的语音网络以及词汇语义激活，这一点在所有的阅读和听力任务之间的连接中得到了揭示。当观察到在理解比单词（如句子和文本）更复杂的语言单位时，大脑区域的增长幅度更大时，模态特异性区域对其相应的单峰皮层的限制被复制。最后，我们讨论了语言复杂性的纯效应区域的可能作用，如上级颞回的前部和中颞回的腹后部，这是激活的句子和文本，而不是孤立的单词，以及在左后STS中发现的文本特定区域。(c)2006年爱思唯尔公司All rights reserved.
Reading and understanding speech are usually considered as different manifestations of a single cognitive ability, that of language. In this study, we were interested in characterizing the specific contributions of input modality and linguistic complexity on the neural networks involved when subjects understand language. We conducted an fMRI study during which 10 right-handed male subjects had to read and listen to words, sentences and texts in different runs. By comparing reading to listening tasks, we were able to show that the cerebral regions specifically recruited by a given modality were circumscribed to unimodal and associative unimodal cortices associated with the task, indicating that higher cognitive processes required by the task may be common to both modalities. Such cognitive processes involved a common phonological network as well as lexico-semantic activations as revealed by the conjunction between all reading and listening tasks. The restriction of modality -specificregions to their corresponding unimodal cortices was replicated when looking at brain areas showing a greater increase during the comprehension of more complex linguistic units than words (such as sentences and texts) for each modality. Finally, we discuss the possible roles of regions showing pure effect of linguistic complexity, such as the anterior part of the superior temporal gyros and the ventro-posterior part of the middle temporal gyrus that were activated for sentences and texts but not for isolated words, as well as a text-specific region found in the left posterior STS. (c) 2006 Elsevier Inc. All rights reserved.