Blumenfeld Henrike K, Booth James R, Burman Douglas D
Department of Communication Sciences and Disorders, Northwestern University, 2240 Campus Drive, Evanston, IL 60208, USA.
Brain Lang. 2006 Dec;99(3):226-35. doi: 10.1016/j.bandl.2005.07.004. Epub 2005 Aug 10.
This study used functional magnetic resonance imaging (fMRI) to examine brain-behavior correlations in a group of 16 children (9- to 12-year-olds). Activation was measured during a semantic judgment task presented in either the visual or auditory modality that required the individual to determine whether a final word was related in meaning to one of two previous words (e.g., found-tank-lost). The main finding was that higher performers (i.e., accuracy) were associated with more activation in posterior representational systems including the inferior and middle temporal gyri, whereas lower performers were associated with more activation in anterior regions including the inferior and middle frontal gyri. This pattern of results was interpreted as reflecting an elaborated semantic representational system in temporal areas for the high accuracy performers that allowed them to efficiently and accurately make meaning based judgments. The low accuracy performers may have an inaccurate or weakly interconnected semantic system that results in greater use of frontal areas in a feature selection process.
本研究使用功能磁共振成像（fMRI）来检查一组16名儿童（9至12岁）的脑-行为相关性。在以视觉或听觉形式呈现的语义判断任务中测量激活情况，该任务要求个体确定最后一个单词在意义上是否与前两个单词之一相关（例如，找到-坦克-丢失）。主要发现是，表现较好者（即准确率较高者）与包括颞下回和颞中回在内的后部表征系统中更多的激活相关，而表现较差者与包括额下回和额中回在内的前部区域中更多的激活相关。这种结果模式被解释为反映了高准确率者在颞叶区域有一个精细的语义表征系统，这使他们能够高效、准确地做出基于意义的判断。准确率较低者可能有一个不准确或联系较弱的语义系统，这导致他们在特征选择过程中更多地使用额叶区域。
