左侧角回在词汇语义加工中的作用

The role of the left Angular Gyrus in lexical-semantic processing

大脑左侧角回是语言认知神经科学研究发现的一个重要语义加工脑区。该脑区在词汇语义加工中的具体功能还没有得到统一的认识,成为研究者广泛关注的热点和焦点问题。结构上,角回位于颞叶、枕叶和顶叶交接区,并且具有广泛的白质纤维束连接,这决定了它可能具有跨区域信息整合的功能。它在高水平语义表征、模态和特征信息联合表征、语义关系表征以及语义整合加工中参与激活,可能是语义表征和加工的信息“聚合区”。然而,左侧角回在语义表征枢纽、语义执行控制加工、默认模式网络的语义加工三方面还存在功能争论,未来研究需要综合考虑左侧角回的解剖结构基础及其与广泛脑区连接的特点,对角回子区域的功能进行深入细致地探讨。

The left Angular Gyrus(LAG)is a critical brain region for semantic processing in the cognitive neuroscience of language.Increasing attention has been paid to the function of LAG in lexical-semantic processing since its function has not been consistently understood.Anatomically,the LAG is located at the junction of the temporal,occipital,and parietal lobes,with extensive white matter fiber bundles,determining that it may integrate information across regions.Researchers have proposed the LAG as the“convergence zone”in semantic representation and processing,as it is activated in high-level semantic representation,conjunctive representation of modalities and feature information,semantic relationship representation,and semantic integration processing.However,there are still debates about the LAG regarding the semantic representation hub,semantic executive control processing,and semantic processing of the default mode network.Future studies should comprehensively consider its anatomical basis and connections with a wide range of brain regions,and conduct in-depth and detailed discussions on the function of the LAG subregion.