State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing, 100875, People's Republic of China.
School of Education, University of Cincinnati, Cincinnati, Ohio, 45221.
Hum Brain Mapp. 2017 Dec;38(12):5859-5870. doi: 10.1002/hbm.23765. Epub 2017 Sep 3.
The present study investigated how language switching experience would modulate the neural correlates of cognitive control involved in bilingual language production. A group of unbalanced Chinese-English bilinguals undertook an 8-day cued picture naming training during which they named pictures in either of their languages based on visually presented cues. Participants' brain activation was scanned before and after the training in the same task. Behavioral results revealed a significant training effect such that switch costs were reduced after training. fMRI results showed that after training, activation of brain areas associated with cognitive control including the anterior cingulated cortex and the caudate was reduced. Besides, the activation reduction in the left dorsal anterior cingulated cortex positively correlated with the reduction in switch costs in response time and this training effect could be transferred to untrained stimuli. These findings suggest that neural correlates of cognitive control, especially that of the conflict monitoring process, in bilingual language production could be modulated by short-term language switching training. Hum Brain Mapp 38:5859-5870, 2017. © 2017 Wiley Periodicals, Inc.
本研究旨在探讨语言切换经验如何调节双语语言产生中涉及认知控制的神经相关性。一组不平衡的中英双语者在 8 天的线索图片命名训练中，根据视觉呈现的线索用任一种语言命名图片。在相同的任务中，参与者在训练前后进行了大脑激活扫描。行为结果显示出显著的训练效果，即训练后转换代价降低。fMRI 结果表明，训练后，与认知控制相关的大脑区域的激活，包括前扣带皮层和尾状核，减少了。此外，左背侧前扣带皮层的激活减少与反应时转换代价的减少呈正相关，并且这种训练效果可以转移到未训练的刺激上。这些发现表明，双语语言产生中认知控制的神经相关性，特别是冲突监测过程的神经相关性，可以通过短期的语言切换训练来调节。人类大脑映射 38:5859-5870, 2017. © 2017 Wiley Periodicals, Inc.
