FMRI of past tense processing: The effects of phonological complexity and task difficulty
FMRI of past tense processing: The effects of phonological complexity and task difficulty
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DOI：
10.1162/jocn.2006.18.2.278
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发表时间：
2006-02-01
影响因子：
3.2
通讯作者：
Binder, JR
中科院分区：
文献类型：
--
作者：
Desai, R;Conant, LL;Binder, JR
规则和不规则过去式动词的产生一直是认知科学中的一个重要问题，并已被用来提出不同的语言在大脑中的组织模型。双系统理论认为，规则过去式是由规则产生的，而不规则过去式是从记忆中提取的。另一方面，单系统观点认为，这两种形式都是由一个单一的综合系统产生的，不同之处只在于它们对语音和语义等因素的依赖。我们进行了一项事件相关的功能磁共振成像研究，以检查与规则和不规则过去时态形式的生成和阅读相关的激活模式，以及对它们的词干的阅读。与阅读各自的词干相比，规则和不规则的过去时态生成激活了相似的大脑区域。不规则世代与规则世代相比，双侧额叶下区、中央前区和顶叶区激活更多。这种激活可以解释为反映了更大的注意力和反应选择的要求不规则的一代。与不规则生成相比，当规则和不规则过去时形式在语音复杂度上不匹配时，规则生成激活了左侧上级颞回的一个小区域。当过去时态形式在这个变量上匹配时，没有哪个区域比非正规者更活跃。这表明，激活特定的规则是有关的更高的语音复杂性的过去式形式，而不是他们的一代。对规则和不规则过去时形式的阅读的对比与这一假设是一致的。这些结果支持了过去时态生成的单系统解释。
The generation of regular and irregular past tense verbs has been an important issue in cognitive science and has been used to advance different models of the organization of language in the brain. The dual-system view holds that the regular past tense forms are generated by a rule while irregular forms are retrieved from memory. The single-system view, on the other hand, holds that both forms are generated by a single integrated system and differ only in their reliance on factors such as phonology and semantics. We conducted an event-related fMRI study to examine the activation patterns associated with the generation and reading of regular and irregular past tense forms, in addition to the reading of their stems. Regular and irregular past tense generation activated similar brain regions compared to the reading of their respective stems. The areas activated more for irregular generation comto regular generation included inferior frontal, precentral, and parietal regions bilaterally. This activation can be interpreted as reflecting the greater attentional and response selection demands of irregular generation. Compared to irregular generation, regular generation activated a small region in the left superior temporal gyrus when the regular and irregular past tense forms were mismatched on phonological complexity. No areas were more activated for regulars than irregulars when the past tense forms were matched on this variable. This suggests that the activation specific to regulars was related to the higher phonological complexity of their past tense forms rather than to their generation. A contrast of the reading of regular and irregular past tense forms was consistent with this hypothesis. These results support a single-system account of past tense generation.