汉字阅读中左侧额中回的子区域分化及其在脑网络中的关键节点作用
Possible subregional differentiation of the left middle frontal gyrus in Chinese character reading and the region’s role as a key node in brain networks
摘要
左侧额中回是语言认知神经科学研究识别汉字阅读特异激活的脑区，其确切功能一直是研究者争议的问题。近年来，大量研究表明，额中回在汉字阅读中的激活可能与工作记忆、执行控制加工等一般认知加工相关。本文系统综述了上述两方面的最新研究进展，并从两个层面解释左侧额中回参与汉字阅读的功能：一是该脑区可能存在功能分离的子区域，即其后部主要参与词汇阅读相关的神经激活，其前部更多承载工作记忆、执行功能等一般认知加工任务。另一种可能是左侧额中回作为跨网络关键节点，在一般认知控制网络与语言/阅读网络之间发挥作用。未来研究需要从跨领域的研究视角，深入探究左侧额中回作为跨网络交互节点在阅读中的动态激活。
Abstract
The left middle frontal gyrus (MFG) has been widely regarded as a region preferentially engaged during Chinese character reading, but its precise functional role remains debated. Growing evidence suggests that activation of this region may also reflect domain-general cognitive demands, particularly those associated with working memory and executive control. This article reviews recent findings from these two perspectives and considers two possible explanations for the involvement of the left MFG in Chinese character reading. First, the left MFG may contain functionally differentiated subregions: its posterior portion may be more closely associated with lexical processing during reading, whereas its anterior portion may contribute more strongly to domain-general cognitive processes, including working memory and executive control. Second, the left MFG may serve as a key cross-network node linking neural networks supporting reading with the domain-general cognitive control network. Future research should integrate evidence across disciplines to clarify how different subregions of the left MFG are dynamically recruited during reading and how this region supports interactions between reading-related and domain-general cognitive networks.关键词
左侧额中回/神经网络/工作记忆/执行控制Key words
left middle frontal gyrus/neural network/working memory/executive control引用本文复制引用
陈甜,黄家萱,王小娟,杨剑峰.汉字阅读中左侧额中回的子区域分化及其在脑网络中的关键节点作用[EB/OL].(2026-09-17)[2026-09-23].https://chinaxiv.org/abs/202609.00164.学科分类
汉语
