Language control and lexical competition in bilinguals: An event-related fMRI study
Language control and lexical competition in bilinguals: An event-related fMRI study
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DOI：
10.1093/cercor/bhm182
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发表时间：
2008-07-01
期刊：
影响因子：
3.7
通讯作者：
Khateb, Asaid
中科院分区：
文献类型：
--
作者：
Abutalebi, Jubin;Annoni, Jean-Marie;Khateb, Asaid
语言选择（或控制）是指在特定的时间和语境中控制使用哪种语言的认知机制。它允许双语者有选择地用一种目标语言进行交流，同时最大限度地减少非目标语言的干扰。以前的研究表明，参与语言控制的不同大脑区域。然而，问题仍然是，在其他语言中选择一种语言是否依赖于语言特定的神经模块或一般执行区域，这些区域也允许在不同的竞争行为反应之间切换，包括在各种语言寄存器之间切换。在这项功能磁共振成像研究中，我们调查了在不同的单语和双语选择环境中的图片命名过程中，德法双语受试者的语言选择过程的神经相关。我们发现，在双语环境中的第一语言命名（与单语环境相比）增加激活左尾状核和前扣带皮层。此外，当受试者使用第二种较弱的语言时，这些区域的激活甚至会更长。这些研究结果表明，语言控制过程中从事的上下文中，这两种语言必须保持活跃的招聘的左尾状核和前扣带皮层（ACC）的方式，可以区分从事语言内任务切换的地区。
Language selection (or control) refers to the cognitive mechanism that controls which language to use at a given moment and context. It allows bilinguals to selectively communicate in one target language while minimizing the interferences from the nontarget language. Previous studies have suggested the participation in language control of different brain areas. However, the question remains whether the selection of one language among others relies on a language-specific neural module or general executive regions that also allow switching between different competing behavioral responses including the switching between various linguistic registers. In this functional magnetic resonance imaging study, we investigated the neural correlates of language selection processes in German-French bilingual subjects during picture naming in different monolingual and bilingual selection contexts. We show that naming in the first language in the bilingual context (compared with monolingual contexts) increased activation in the left caudate and anterior cingulate cortex. Furthermore, the activation of these areas is even more extended when the subjects are using a second weaker language. These findings show that language control processes engaged in contexts during which both languages must remain active recruit the left caudate and the anterior cingulate cortex (ACC) in a manner that can be distinguished from areas engaged in intralanguage task switching.