Automatic processing of semantic relations in fMRI: Neural activation during semantic priming of taxonomic and thematic categories

详细信息    查看全文

• 作者：Olga Sachs ; Susanne Weis ; Nadia Zellagui ; Walter Huber ; Mikhail Zvyagintsev ; Klaus Mathiak ; Tilo Kircher
• 关键词：Categorization ; Semantic priming ; fMRI ; Thematic ; Taxonomic
• 刊名：Brain Research
• 出版年：2008
• 出版时间：7 July 2008
• 年：2008
• 卷：1218
• 期：Complete
• 页码：194-205
• 全文大小：409 K

文摘

Most current models of knowledge organization are based on hierarchical or taxonomic categories (animals, tools). Another important organizational pattern is thematic categorization, i.e. categories held together by external relations, a unifying scene or event (car and garage).The goal of this study was to compare the neural correlates of these categories under automatic processing conditions that minimize strategic influences. We used fMRI to examine neural correlates of semantic priming for category members with a short stimulus onset asynchrony (SOA) of 200 ms as subjects performed a lexical decision task. Four experimental conditions were compared: thematically related words (car–garage); taxonomically related (car–bus); unrelated (car–spoon); non-word trials (car–derf).