期刊
NEUROPSYCHOLOGIA
卷 156, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropsychologia.2021.107857
关键词
Language production; Naming context; Representational similarity analysis; Inferior frontal gyrus; fMRI
资金
- Guangdong Basic and Applied Basic Research Foundation [2019A1515011027]
- National Natural Science Foundation of China [31970983, 31771199]
- Foundation for Innovation Teams in Guangdong Higher Education [2017WCXTD002]
- Funding for Key Laboratory for Social Sciences of Guangdong Province [2015WSYS009]
This study investigated the neural mechanisms of language production in bilinguals, revealing that bilinguals exhibit similar neural activation patterns in the production of the non-dominant language in both monolingual and bilingual contexts.
Language production is a vital process of communication. Although many studies have devoted to the neural mechanisms of language production in bilinguals, they mainly focused on the mechanisms of cognitive control during language switching. Therefore, it is not clear how naming context influences the neural representations of linguistic information during language production in bilinguals. To address that question, the present study adopted representational similarity analysis (RSA) to investigate the neural pattern similarity (PS) between the monolingual and bilingual contexts separately for native and second languages. Consistent with previous findings, bilinguals behaviorally performed worse, and showed greater activation in brain regions for cognitive control including the anterior cingulate cortex and dorsolateral prefrontal cortex in the bilingual context relative to the monolingual context. More importantly, RSA revealed that bilinguals exhibited similar neural activation patterns in the bilateral dorsal inferior frontal gyrus between the monolingual and bilingual contexts in the production of the second language. Moreover, higher cross-context PS in the right inferior frontal gyrus was associated with smaller differences in naming speed of second language between the monolingual and bilingual contexts. These results suggest that similar linguistic representations are encoded for the monolingual and bilingual contexts in the production of non-dominant language.
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