A common neural hub resolves syntactic and non-syntactic conflict through cooperation with task-specific networks.
A common neural hub resolves syntactic and non-syntactic conflict through cooperation with task-specific networks.
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DOI：
10.1016/j.bandl.2016.12.006
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发表时间：
2017-03
影响因子：
2.5
通讯作者：
Novick JM
中科院分区：
文献类型：
--
作者：
Hsu NS;Jaeggi SM;Novick JM
左额下回（LIFG）内的区域同时与句法处理和认知控制有关。试图统一 LIFG 功能的说法假设，在理解过程中，认知控制解决了句子意义的不相容表示之间的冲突。一些研究表明，LIFG 内存在句法和非句法冲突解决的共定位活动，表明领域通用性，但其他研究则显示出非重叠活动，表明特定领域的认知控制和/或对句法做出独特反应的区域。然而，我们建议检查某些对比的排他激活位点会产生错误的二分法：通用领域和特定领域的神经机制必须协调以促进跨领域的冲突解决。在这里，受试者在接受功能磁共振成像时完成了四项涉及冲突的不同任务——一项是句法任务，三项是非句法任务。尽管 LIFG 在冲突处理过程中在个体内部持续激活，但功能连接分析揭示了与不同大脑网络的特定任务协调。因此，LIFG 可以充当冲突解决“中心”，根据信息内容与专门的神经系统合作。
Regions within the left inferior frontal gyrus (LIFG) have simultaneously been implicated in syntactic processing and cognitive control. Accounts attempting to unify LIFG’s function hypothesize that, during comprehension, cognitive control resolves conflict between incompatible representations of sentence meaning. Some studies demonstrate co-localized activity within LIFG for syntactic and non-syntactic conflict resolution, suggesting domain-generality, but others show non-overlapping activity, suggesting domain-specific cognitive control and/or regions that respond uniquely to syntax. We propose however that examining exclusive activation sites for certain contrasts creates a false dichotomy: both domain-general and domain-specific neural machinery must coordinate to facilitate conflict resolution across domains. Here, subjects completed four diverse tasks involving conflict —one syntactic, three non-syntactic— while undergoing fMRI. Though LIFG consistently activated within individuals during conflict processing, functional connectivity analyses revealed task-specific coordination with distinct brain networks. Thus, LIFG may function as a conflict-resolution “hub” that cooperates with specialized neural systems according to information content.