School of Foreign Languages, Southwest University of Political Science and Law, Chongqing 401120, China; College of International Studies, Southwest University, Chongqing 400715, China; Center for Legal Language, Culture and Translation Studies, Southwest University of Political Science and Law, Chongqing 401120, China.
Faculty of Psychology, Southwest University, Chongqing 400715, China; Key Laboratory of Cognition and Personality of Ministry of Education, Southwest University, Chongqing 400715, China.
Brain Lang. 2019 Jul;194:23-34. doi: 10.1016/j.bandl.2019.04.001. Epub 2019 Apr 13.
In bilingual speakers, language switching might involve a change in language form, meaning, or both. However, the neural substrates of language control in the three switching conditions have not been specified. We examined bilingual speech production using a picture-naming paradigm that teased apart language and semantic switching. Bilingual participants named two serially presented pictures, which show the same or different object, with one or two languages. The three switching conditions showed distinct neural activation patterns within the prefrontal cortex. Moreover, neural substrates shared by all switching conditions were primarily found in fronto-parietal regions. Besides, forward switching (L1-to-L2) activated a more widespread neural network than backward switching (L2-to-L1). We discuss differential engagement of the cognitive control system as a function of switching type during bilingual speech production.
在双语使用者中，语言切换可能涉及语言形式、意义或两者的变化。然而，三种切换条件下的语言控制的神经基础尚未确定。我们使用图片命名范式研究双语言语产生，该范式可以区分语言和语义切换。双语参与者用一种或两种语言连续命名两个显示相同或不同物体的图片。三种切换条件在额皮质内显示出不同的神经激活模式。此外，所有切换条件共有的神经基质主要在前额顶叶区域发现。此外，向前切换（L1 到 L2）比向后切换（L2 到 L1）激活了更广泛的神经网络。我们讨论了在双语言语产生过程中，作为切换类型函数的认知控制系统的差异参与。
