汉语语调早期加工的脑机制  

Early Cortical Processing of Mandarin Intonation

作　　者：任桂琴[1] 韩玉昌[1] 周永垒[2] 任延涛[3] 

机构地区：[1]辽宁师范大学心理系,大连116029 [2]海军大连舰艇学院政治系,大连116001 [3]中国刑事警察学院,沈阳110854

出　　处：《心理学报》2011年第3期241-248,共8页Acta Psychologica Sinica

基　　金：辽宁省教育厅重点实验室项目(2009S062);辽宁省自然科学基金项目(20062141)资助

摘　　要：采用ERP方法,结合LORETA源定位分析技术,考察了汉语语调早期自动加工的脑机制。结果发现:(1)对于附着在二声调汉字后的语调,无论以单字词的形式,还是以句子的形式呈现,都没有诱发MMN;(2)当过滤掉实验刺激的言语信息后,词音高和句子音高条件均诱发了MMN,且这两个条件下的MMN波幅差异不显著;(3)LORETA分析发现,句子音高条件在右半球顶叶的多个区域存在显著激活。该结果拓展了以往的研究结论,为声学假设提供了证据。Linguistic pitch information is used to signal different aspects of spoken language such as lexical tone and intonation.An important issue that is particularly relevant to the processing of linguistic pitch information concerns language lateralization in the human brain.Two competing hypotheses based on the data from brain imaging studies were proposed to state the neural mechanisms underlying human pitch perception.However,the low temporal resolution related to neuroimaging techniques might not explicitly detect the brain activities occur at a relatively small or a determined time frame.We used the mismatch negativity（MMN） and a source estimation technique（LORETA） to probe the brain activities underlying the early pre-attentive processing of Mandarin intonation.The target was Chinese character [lai2] which was pronounced in a declarative intonation and an interrogative intonation respectively.A passive oddball paradigm was applied to present declarative and interrogative intonation contrast for the syllable context condition,sentence context condition and their corresponding hummed versions.Thirteen Chinese college students were recruited to participate in the experiment and the participants were instructed to watch a silent movie and ignore the sounds from the headphone during the course of experiment.The results showed that no MMN was elicited for the contrast of declarative intonation and interrogative intonation in the syllable intonation and sentence intonation conditions.However,the MMN was evoked when the linguistic information was removed from the two conditions above,and no significant differences of the MMN amplitudes existed between the hummed syllable and sentence intonation conditions.Source localization of MMNs for the hummed conditions showed the right hemispheric dominance.In conclusion,these findings suggest that the pre-attentive cortical processing for Mandarin intonation can be modulated by the temporal window of linguistic pitch patterns manifested at syllable level and sentence leve

关 键 词：汉语语调 早期加工 MMN ERP LORETA 

分 类 号：B842[哲学宗教—基础心理学]