Response of anterior temporal cortex to syntactic and prosodic manipulations during sentence processing
Response of anterior temporal cortex to syntactic and prosodic manipulations during sentence processing
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DOI：
10.1002/hbm.20148
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发表时间：
2005-10-01
影响因子：
4.8
通讯作者：
Hickok, G
中科院分区：
文献类型：
--
作者：
Humphries, C;Love, T;Hickok, G
先前的研究表明，部分颞叶前部皮层参与句子水平的加工。这个区域对句子的激活比对单词列表、陌生语言的句子和环境声音序列的激活更多。目前的研究旨在确定句法和韵律加工对前颞叶激活的相对贡献。我们在功能磁共振成像（fMRI）中提出了听觉刺激，其中韵律和句法结构的存在被独立操纵。三种“结构”条件包括正常句子、词序混乱的句子和实词列表。这三类刺激要么以句子韵律呈现，要么以扁平的超词汇（表状）韵律呈现。句子刺激激活了颞上沟（STS）中左侧颞前皮层的一部分，并延伸到颞中回，与韵律无关，并且比任何其他条件都更大。结构条件和韵律条件之间的相互作用在颞叶前部更背侧的区域沿着颞上回（STG）被观察到。事后分析表明，这一区域对句法结构的刺激或句子韵律的非结构化刺激都有反应。结果表明，前颞叶皮层被分割成1)一个STG区域，该区域对句法信息的存在敏感，并受到韵律操纵（非句法刺激）的调节；2)左侧STS/MTG区域较低，对句法结构的选择性更强。
Previous research has implicated a portion of the anterior temporal cortex in sentence-level processing. This region activates more to sentences than to word-lists, sentences in an unfamiliar language, and environmental sound sequences. The current study sought to identify the relative contributions of syntactic and prosodic processing to anterior temporal activation. We presented auditory stimuli where the presence of prosodic and syntactic structure was independently manipulated during functional magnetic resonance imaging (fMRI). Three "structural" conditions included normal sentences, sentences with scrambled word order, and lists of content words. These three classes of stimuli were presented either with sentence prosody or with flat supra-lexical (list-like) prosody. Sentence stimuli activated a portion of the left anterior temporal cortex in the superior temporal sulcus (STS) and extending into the middle temporal gyrus, independent of prosody, and to a greater extent than any of the other conditions. An interaction between the structural conditions and prosodic conditions was seen in a more dorsal region of the anterior temporal lobe bilaterally along the superior temporal gyrus (STG). A post-hoc analysis revealed that this region responded either to syntactically structured stimuli or to nonstructured stimuli with sentence-like prosody. The results suggest a parcellation of anterior temporal cortex into 1) an STG region that is sensitive both to the presence of syntactic information and is modulated by prosodic manipulations (in nonsyntactic stimuli); and 2) a more inferior left STS/MTG region that is more selective for syntactic structure.