Anatomical variability in the cortical representation of first and second language
Anatomical variability in the cortical representation of first and second language
复制标题
DOI：
10.1097/00001756-199712010-00030
复制
发表时间：
1997-12-01
期刊：
影响因子：
1.7
通讯作者：
LeBihan, D
中科院分区：
文献类型：
--
作者：
Dehaene, S;Dupoux, E;LeBihan, D
功能磁共振成像被用来评估语言理解过程中皮层表征的受试者之间的变异性。法国-英语双语水平一般的人在听七岁后在学校学到的第一语言(L1=法语)或第二语言(L2=英语)故事时，会被扫描。在所有受试者中，听L1总是会激活左侧颞叶中类似的一组区域，这些区域沿着左侧上颞沟聚集。然而，听L2激活了由左右颞叶和额叶区域组成的高度可变的网络，有时仅限于右半球区域。这些结果支持这样一种假设，即第一语言习得依赖于专用的左半球大脑网络，而后期第二语言习得并不一定与可复制的生物底物有关。研究发现，假设的右半球对二语理解的贡献(1)仅平均适用，个体的二语理解从完全的右侧化到标准的左侧化不等。
FUNCTIONAL magnetic resonance imaging was used to assess inter-subject variability in the cortical representation of language comprehension processes. Moderately fluent French-English bilinguals were scanned while they listened to stories in their first language (L1 = French) or in a second language (L2 = English) acquired at school after the age of seven. In all subjects, listening to L1 always activated a similar set of areas in the left temporal lobe, clustered along the left superior temporal sulcus. Listening to L2, however, activated a highly variable network of left and right temporal and frontal areas, sometimes restricted only to right-hemispheric regions. These results support the hypothesis that first language acquisition relies on a dedicated left-hemispheric cerebral network, while late second language acquisition is not necessarily associated with a reproducible biological substrate. The postulated contribution of the right hemisphere to L2 comprehension(1) is found to hold only on average, individual subjects varying from complete right lateralization to standard left lateralization for L2.