英语单词语义理解脑区激活研究

目的：以fMRI为研究手段探讨英语单词语义理解任务时的脑区激活.方法：母语为汉语的汉英双语者12人,分为英语专业组及非英语专业组,执行英语单词语义理解任务,采集fMRI图像数据,了解语言任务作业时的脑区激活分布模式.结果：所有受试者均出现显著的脑区激活,除传统语言脑区Wemicke和Broca区外,还出现其它脑区激活,如小脑、边缘系统、基底神经节等.英语专业组执行英语任务时更多依赖右侧半球机制.结论：左侧半球主导语言认知功能,右侧大脑半球不同程度参与该过程.右侧半球执行英语任务作业机制与第二语言的熟练程度相关.不同受试者之间语言认知模式存在个体差异.

The investigation of cerebral activation for English semantic judgment task in Chinese by fMRI

Objective: To determine the cerebral activation patterns associated with processing of English semantic judgment task by fMRI in native Chinese bilinguists.Methods: 12 native Chinese bilinguists were divided into two groups with 6 in each group,English-specialized and non-English-specialized group,and performed English words semantic judgment task,whose fMRI images were collected.Results: All subjects demonstrated significant activation of associated cerebral regions.Besides classical regions involved in language processing,such as Wernicke and Broca areas,there were other activated cerebral regions,including cerebellum,limbic system and basal ganglial nucleus,etc.The analysis of ROI implied that subjects in the specialized group were more dependent on the right hemisphere.Conclusions: Left hemisphere dominates in language cognition,although which is also related to the right hemisphere to various degrees.Two hemispheres work by ways of both dissociation and coordination.It is possible that working strategy of the right hemisphere is related to proficiency of the second language.A variety of distinctions are shared by each subject for language cognitive patterns.