Semantic-specific and domain-general mechanisms for integration and update of contextual information.
Semantic-specific and domain-general mechanisms for integration and update of contextual information.
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DOI：
10.1002/hbm.26454
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发表时间：
2023-12-01
影响因子：
4.8
通讯作者：
Ralph, Matthew A. Lambon
中科院分区：
文献类型：
--
作者：
Branzi, Francesca M.;Ralph, Matthew A. Lambon
最近的研究强调了领域一般过程和大脑区域对语言和语义认知的重要性。然而，这主要是在执行要求高的任务中观察到的，留下了领域一般过程对自然语言和语义认知的贡献的问题。使用功能磁共振成像，我们调查是否反映上下文整合和上下文更新的两个关键方面的自然语言和语义处理的神经过程是域特定的域一般。因此，我们比较了在语义和非语义任务中整合上下文信息时的神经反应。全脑结果揭示了参与情境整合和更新的共有（左后背侧额下回、左后颞下回和左背侧角回/顶内沟）和不同（左前腹侧额下回、左前腹侧角回、左后颞中回仅用于语义控制）区域。此外，数据驱动的功能连接分析将特定领域与一般领域的大脑区域聚类为不同但相互作用的功能神经网络。这些结果首次沿着领域特异性维度描述了语言加工过程中语境依赖整合所需的神经过程，同时也为左后外侧颞叶皮层和左角回在语义认知中的作用带来了新的见解。语义控制和领域一般控制是部分分离的。IFG、pLTC和AG揭示了结构域特异性和结构域一般亚区。特定领域网络和通用领域网络协同工作，以实现上下文集成。
Recent research has highlighted the importance of domain‐general processes and brain regions for language and semantic cognition. Yet, this has been mainly observed in executively demanding tasks, leaving open the question of the contribution of domain‐general processes to natural language and semantic cognition. Using fMRI, we investigated whether neural processes reflecting context integration and context update—two key aspects of naturalistic language and semantic processing—are domain‐specific versus domain‐general. Thus, we compared neural responses during the integration of contextual information across semantic and non‐semantic tasks. Whole‐brain results revealed both shared (left posterior‐dorsal inferior frontal gyrus, left posterior inferior temporal gyrus, and left dorsal angular gyrus/intraparietal sulcus) and distinct (left anterior‐ventral inferior frontal gyrus, left anterior ventral angular gyrus, left posterior middle temporal gyrus for semantic control only) regions involved in context integration and update. Furthermore, data‐driven functional connectivity analysis clustered domain‐specific versus domain‐general brain regions into distinct but interacting functional neural networks. These results provide a first characterisation of the neural processes required for context‐dependent integration during language processing along the domain‐specificity dimension, and at the same time, they bring new insights into the role of left posterior lateral temporal cortex and left angular gyrus for semantic cognition. Semantic control and domain‐general control are partially dissociable. IFG, pLTC, and AG revealed both domain‐specific and domain‐general subregions. Domain‐specific and domain‐general networks work in tandem for context integration.
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影响因子：
2.6
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