Spatiotemporal distribution of cortical processing of first and second languages in bilinguals. I. Effects of proficiency and linguistic setting.
Spatiotemporal distribution of cortical processing of first and second languages in bilinguals. I. Effects of proficiency and linguistic setting.
复制标题
双语者第一语言和第二语言皮质处理的时空分布。
DOI：
10.1002/hbm.22111
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发表时间：
2013
影响因子：
4.8
通讯作者：
Starr,Arnold
中科院分区：
文献类型：
--
作者：
Pratt,Hillel;Abbasi,DalalAbu-Amneh;Bleich,Naomi;Mittelman,Nomi;Starr,Arnold
该研究确定了第一和第二语言中单词的皮层活动的时空分布如何受到语言，熟练程度和语言环境的影响。10名早期双语者和14名晚期成人双语者听阿拉伯语（L1），希伯来语（L2）或混合对的单词，并指出这两个单词是否具有相同的含义。估计事件相关电位的源电流密度。在两组中，对第一个词的活动都偏向右半球，在早期加工（<300 ms）中，L1高于L2，但在晚期加工（>300 ms）中，仅在晚期双语者中。在早期和后期处理，活动是较大的混合比单语设置在早期双语，但低于混合比单语设置在后期双语。两组听觉区的晚期加工均是左半球大于右半球。在两组的早期和晚期处理过程中，在混合环境中，对第二个词的活动比单语环境中的活动大。早期处理的第二个词在听觉区域偏侧的早期双语者之间的权利和后期双语者之间的左，而后期处理组之间没有差异。结果表明，双语者大脑皮层语言加工在早期和晚期存在差异，这种差异受语言水平和语言环境的影响。《脑地图》34：2863-2881，2013年。© 2012 Wiley Periodicals，Inc.
The study determined how spatiotemporal distribution of cortical activity to words in first and second language is affected by language, proficiency, and linguistic setting. Ten early bilinguals and 14 late adult bilinguals listened to pairs of words presented in Arabic (L1), Hebrew (L2), or in mixed pairs and indicated whether both words had the same meaning or not. Source current densities of event‐related potentials were estimated. Activity to first words in the pair lateralized to right hemisphere, higher to L1 than L2 during early processing (<300 ms) among both groups but only among late bilinguals during late processing (>300 ms). During early and late processing, activities were larger in mixed than monolinguistic settings among early bilinguals but lower in mixed than in monolinguistic settings among late bilinguals. Late processing in auditory regions was of larger magnitude in left than right hemispheres among both groups. Activity to second words in the pair was larger in mixed than in monolinguistic settings during both early and late processing among both groups. Early processing of second words in auditory regions lateralized to the right among early bilinguals and to the left among late bilinguals, whereas late processing did not differ between groups. Wernicke's area activity during late processing of L2 was larger on the right, while on the left no significant differences between languages were found. The results show that cortical language processing in bilinguals differs between early and late processing and these differences are modulated by linguistic proficiency and setting. Hum Brain Mapp 34:2863–2881, 2013. © 2012 Wiley Periodicals, Inc.