How to better suppress the interference from the non-target language when switching from one language to the other in bilingual production? The current study applied transcranial direct current stimulation over the right dorsolateral prefrontal cortex to modulate language control measured by cross-frequency coupling. We found that switching to L2 was more modulated by F4–F3 alpha–beta phase-amplitude compared to switching to L1 after receiving the anodal stimulation at the language task schema phase. These findings suggest that anodal stimulation affects the selection of the target language task schema by enhancing the activation of frontal areas and facilitating the coordination between the left and the right frontal hemispheres.

中文翻译：

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经颅直流电刺激影响双语语言控制机制：跨频耦合的证据

在双语制作中从一种语言切换到另一种语言时，如何更好地抑制来自非目标语言的干扰？当前的研究在右后外侧前额叶皮层上应用经颅直流电刺激，以调节通过跨频耦合测量的语言控制。我们发现，与在语言任务模式阶段接受阳极刺激后切换到L1相比，切换到L2受F4-F3α-β相幅度的调制更多。这些发现表明，阳极刺激通过增强额叶区域的激活并促进左右额叶半球之间的协调来影响目标语言任务模式的选择。