Zahn R, Huber W, Drews E, Erberich S, Krings T, Willmes K, Schwarz M
Department of Neurology, University Hospital RWTH, Aachen, Germany.
Neurosci Lett. 2000 Jun 30;287(3):195-8. doi: 10.1016/s0304-3940(00)01160-5.
We used functional magnetic resonance imaging to disentangle the functional anatomy of brain systems involved in the processing of auditory word form and meaning. Three monitoring tasks on auditory stimuli, aimed at phonetic, lexical and semantic processing, were used. We found no lateralization of temporal lobe activations, when word processing was contrasted versus the complex phonetic task. Bilateral middle temporal activations (Brodmann Area [BA] 21) were attributed to processing of word-form. Areas specific to semantic processing were restricted to the left hemisphere: the posterior middle frontal (BA 9) and posterior parietal (BA 7/40) cortex, as well as an inferior temporal area (BA 20/21). Our data suggest, that left hemispheric dominance for auditory word comprehension occurred at the level of semantic processing.
我们使用功能磁共振成像来解析参与听觉单词形式和意义处理的大脑系统的功能解剖结构。我们采用了三项针对听觉刺激的监测任务，分别针对语音、词汇和语义处理。当将单词处理与复杂语音任务进行对比时，我们发现颞叶激活没有出现偏侧化。双侧颞中回激活（布罗德曼区[BA]21）归因于单词形式的处理。语义处理特有的区域局限于左半球：额中回后部（BA 9）和顶叶后部（BA 7/40）皮质，以及颞下回区域（BA 20/21）。我们的数据表明，听觉单词理解的左半球优势出现在语义处理层面。
