母语为汉语的正常人运动性语言功能区定位

背景:汉字是世界上仅存的非拼音文字,汉字的认知使用意符、音符、记号3种形式,在视觉上,汉字具有形、音、义的结合,其认知形式、认知途径、字意分析判断和存储均有别于西方拼音文字,汉字的处理加工过程可能会与拼音文字不同。目的:采用脑磁图的等价偶极子定位法和合成孔径磁场定位法定位母语为汉语的健康自愿者的运动性语言中枢。设计:单一样本单一素分析。单位:首都医科大学附属北京天坛医院神经内科。对象:于2003-07/2005-04在首都医科大学附属北京天坛医院神经内科研究生或进修人员中选择母语为汉语的健康自愿者10名,均为右利手,无言语障碍及认知障碍。试验前均接受语言任务培训。方法:对健康受试者给予默读真词、假词的语言任务刺激,严格匹配默读名词的数量,每个名词呈现的时间及两个任务之间的间隔时间。①真字:常见高频字,符合汉字偏旁部首规则,笔画在4～13划。②假字:符合汉字组字规则,由汉字造字软件造成,但不能构成字的笔画集合体,笔画在4～13划。采用脑磁图记录刺激后产生的诱发磁场,将采集的数据与MRI叠加获得语言功能区定位。结果:10名自愿者均完成测试,全部进入结果分析。真词、假词均在双侧大脑半球诱发出明显的晚发磁反应波,左侧大脑半球磁反应波分化较右侧大脑半球好,运动性语言中枢均位于额下回后部。结论:母语为汉语的正常人的运动性与经典的运动性语言中枢基本相符,即母语为汉语的正常人的运动性语言中枢定位于额下回后部。

Localization of motor language functional area in normal people whose native language is Chinese

BACKGROUND: Chinese character is the only non-alphabetic system of writing, the patterns of semantic symbol, phonetic symbol and sign in the cognition of Chinese characters, it is the combination of form, sound and meaning, and its cognitive pattern, pathway, analytical judgement of semantic and storage are different from those of western alphabetic system of writing, and the processing of Chinese characters maydifferent from that of alphabetic system of writing.OBJECTIVE: To localize the motor language center of the healthy volunteers whose native language is Chinese by means of the equivalent current dipole (ECD) and synthetic aperture magnetometry (SAM) of magnetoen cephalography (MEG).DESIGN: A single-sample univariate analysis.SETTING: Department of Neurology, Beijing Tiantan Hospital affiliated to Capital University of Medical Sciences.PARTICIPANTS: Ten healthy volunteers whose native language is Chinese were selected from the postgraduates and training participants in the Department of Neurology, Beijing Tiantan Hospital affiliated to Capital University of Medical Sciences between July 2003 and April 2005, they were all right handedness and had no speech disorders and cognitive impairments, and all accepted training of language task.METHODS: All the healthy subjects were given the language task stimulation of reading words and pseudowords silently, the number of the silently read nouns, appearing time for each noun and the interval between two tasks were strictly matched, ① Words were the common high-frequency characters, accorded to the law of Chinese characters components, and had 4-13 strokes. ② Pseudowords, composed by Chinese characters made-up software, accorded to the made-up law of Chinese character, but could not compose the stroke assemble of the character, and had 4-13 strokes. The evoked magnetic field produced after the stimulation was recorded with MEG, the collected data were overlapped with MRI to obtain the localization of language functional areas.RESULTS: All the 10 volunteers finished the test and entered the analysis of results. Both words and pseudowords evoked obvious late magnetic reaction waves in bilateral cerebral hemispheres, the motor language centers both located at posterior inferior frontal gyrus.CONCLUSION: The motor and classic motor language centers are general concordant in the normal people whose native language is Chinese, that was to say, the motor language center localizes at posterior inferior frontal gyrus of normal people whose native language is Chinese.