Effects of syntactic structure and propositional number on patterns of regional cerebral blood flow
Effects of syntactic structure and propositional number on patterns of regional cerebral blood flow
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DOI：
10.1162/089892998562843
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发表时间：
1998-07-01
影响因子：
3.2
通讯作者：
Waters, G
中科院分区：
文献类型：
--
作者：
Caplan, D;Alpert, N;Waters, G
正电子发射断层扫描（PET）被用来确定局部脑血流量（rCBF）的句法形式和句子的命题密度的函数。当受试者处理句法上更复杂的句子时，左侧小脑盖部（布罗卡区的一部分）的rCBF增加。当受试者对具有两个命题的句子进行可验证性判断时，与具有一个命题的句子相比，传统上与语言处理相关的侧裂周联合皮层的rCBF没有差异，但下后脑区域的rCBF增加。这些结果表明，有一个专门的神经组织在布罗卡区的建设方面的句子的句法形式，以确定句子的意义。他们还认为，这种专门化与大脑系统是分开的，大脑系统参与利用已经理解的句子的含义来完成任务。
Positron emission tomography (PET) was used to determine regional cerebral blood flow (rCBF) as a function of the syntactic form and propositional density of sentences. rCBF increased in the left pars opercularis, part of Broca's area, when subjects processed syntactically more complex sentences. There were no differences in rCBF in the perisylvian association cortex traditionally associated with language processing when subjects made plausibility judgments about sentences with two propositions as compared to sentences with one proposition, but rCBF increased in infero-posterior brain regions. These results suggest that there is a specialization of neural tissue in Broca's area for constructing aspects of the syntactic form of sentences to determine sentence meaning. They also suggest that this specialization is separate from the brain systems that are involved in utilizing the meaning of a sentence that has been understood to accomplish a task.