Left insula activation: A marker for language attainment in bilinguals

被引:112
作者
Chee, MWL [1 ]
Soon, CS
Lee, HL
Pallier, C
机构
[1] Singapore Gen Hosp, Cognit Neurosci Sect, Singapore 169611, Singapore
[2] CEA, Serv Hosp Frederic Joliot, Cognit Neuroimaging Unit, INSERM U562, F-91401 Orsay, France
关键词
phonological working memory; functional MRI; intergroup differences;
D O I
10.1073/pnas.0403703101
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Several lines of evidence suggest the importance of phonological working memory (PWM) in language acquisition. We investigated the neural correlates of PWM in young adults who were under compelling social pressure to be bilingual. Equal bilinguals had high proficiency in English and Chinese as measured by a standardized examination, whereas unequal bilinguals were proficient in English but not Chinese. Both groups were matched on several measures of nonverbal intelligence and working memory. In-scanner behavioral results did not show between-group differences. Of the regions showing load-dependent increments in activation, the left insula showed greater activation in equal bilinguals. Unequal bilinguals showed greater task-related deactivation in the anterior medial frontal region and greater anterior cingulate activation. Although unequal bilinguals kept apace with equal bilinguals in the simple PWM task, the differential cortical activations suggest that more optimal engagement of PWM in the latter may correlate with better second-language attainment.
引用
收藏
页码:15265 / 15270
页数:6
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