Department of Psychology and Sociology. University of Zaragoza, Teruel, Spain..
Neuropsychology and Functional Neuroimaging Group, Department of Basic Psychology, Clinical Psychology and Psychobiology, University Jaume I, 12071 Castellón, Spain.
Brain Lang. 2023 Feb;237:105231. doi: 10.1016/j.bandl.2023.105231. Epub 2023 Jan 28.
The present research used fMRI to longitudinally investigate the impact of learning new vocabulary on the activation pattern of the language control network by measuring BOLD signal changes during picture naming tasks with familiar pre-existing native words (old words) and new vocabulary. Nineteen healthy participants successfully learned new synonyms for already known Spanish words, and they performed a picture naming task using the old words and the new words immediately after learning and two weeks after learning. The results showed that naming with old words, compared to naming with newly learned words, produced activations in a cortical network involving frontal and parietal regions, whereas the opposite contrast showed activation in a broader cortical/subcortical network, including the SMA/ACC, the hippocampus, and the midbrain. These two networks are maintained two weeks after learning. These results suggest that the language control network can be separated into two functional circuits for diverse cognitive purposes.
本研究采用 fMRI 技术，通过在图片命名任务中测量熟悉的预先存在的母语（旧词）和新词汇的 BOLD 信号变化，纵向研究学习新词汇对语言控制网络激活模式的影响。19 名健康参与者成功地学习了已知名词的同义词，他们在学习后立即和两周后进行图片命名任务，使用旧词和新词。结果表明，与命名新学词汇相比，用旧词命名会在涉及额顶叶区域的皮质网络中产生激活，而相反的对比则会在更广泛的皮质/皮质下网络中产生激活，包括 SMA/ACC、海马体和中脑。这两个网络在学习两周后仍然存在。这些结果表明，语言控制网络可以为不同的认知目的分为两个功能回路。
