ELECTROPHYSIOLOGICAL EVIDENCE FOR CATEGORY-SPECIFIC WORD-PROCESSING IN THE NORMAL HUMAN BRAIN
ELECTROPHYSIOLOGICAL EVIDENCE FOR CATEGORY-SPECIFIC WORD-PROCESSING IN THE NORMAL HUMAN BRAIN
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DOI：
10.1097/00001756-199511000-00014
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发表时间：
1995-11-13
期刊：
影响因子：
1.7
通讯作者：
DEHAENE, S
中科院分区：
文献类型：
--
作者：
DEHAENE, S
词汇类别的选择性损伤，如名词与动词，表明了人类大脑中词汇知识的区域表征。采用事件相关电位（ERPs）研究了正常成人视觉文字加工的时程。受试者进行了一个词的分类任务与五类刺激：动物的名字，动词，数字，专有名词和无意义的辅音字符串。一个双边后方ERP的差异，字和辅音之间的第一次出现192毫秒刺激发作后，可能反映了建设的视觉词的形式。特定类别的ERP差异开始出现约260毫秒。有一个左颞顶叶负动物的名字和动词，左下颞负专有名称，和双边积极的数字。这些结果提供了一个双侧顶叶阳性证据的时间和粗定位的类别特定的文字处理在正常人脑。
SELECTIVE impairment of word categories such as nouns vs verbs has suggested a regional representation of lexical knowledge in the human brain. The time course of visual word processing was investigated using event-related potentials (ERPs) in normal adults. Subjects performed a word classification task with five categories of stimuli: animal names, verbs, numerals, proper names and meaningless consonant strings. A bilateral posterior ERP difference between words and consonants first appeared 192 ms following stimulus onset, probably reflecting the construction of the visual word form. Category-specific ERP differences began to appear around 260 ms. There was a left temporo-parietal negativity for animal names and verbs, a left inferior temporal negativity for proper names, and a bilateral positivity for numerals. These results provide a bilateral parietal positivity evidence for timing and coarse localization of category-specific word processing in the normal human brain.