Abutalebi Jubin, Keim Roland, Brambati Simona M, Tettamanti Marco, Cappa Stefano F, De Bleser Ria, Perani Daniela
Department of Neuroscience, Vita-Salute San Raffaele University and Scientific Institute H San Raffaele, Milan, Italy.
Hum Brain Mapp. 2007 Jan;28(1):19-33. doi: 10.1002/hbm.20240.
With event-related functional MRI (fMRI) and with behavioral measures we studied the brain processes underlying the acquisition of native language literacy. Adult dialect speakers were scanned while reading words belonging to three different conditions: dialect words, i.e., the native language in which subjects are illiterate (dialect), German words, i.e., the second language in which subjects are literate, and pseudo-words. Investigating literacy acquisition of a dialect may reveal how novel readers of a language build an orthographic lexicon, i.e., establish a link between already available semantic and phonological representations and new orthographic word forms. The main results of the study indicate that a set of regions, including the left anterior hippocampal formation and subcortical nuclei, is involved in the buildup of orthographic representations. The repeated exposure to written dialect words resulted in a convergence of the neural substrate to that of the language in which these subjects were already proficient readers. The latter result is compatible with a "fast" brain plasticity process that may be related to a shift of reading strategies.
我们运用事件相关功能磁共振成像（fMRI）和行为测量方法，研究了母语读写能力习得背后的大脑过程。成年方言使用者在阅读属于三种不同条件的单词时接受扫描：方言词汇，即受试者不识字的母语（方言）、德语单词，即受试者识字的第二语言，以及假词。研究方言的读写能力习得可能会揭示语言的新读者如何构建正字法词典，即在已有的语义和语音表征与新的正字法单词形式之间建立联系。该研究的主要结果表明，包括左前海马结构和皮层下核在内的一组区域参与了正字法表征的形成。反复接触书面方言词汇导致神经基质与这些受试者已经熟练阅读的语言的神经基质趋同。后一结果与可能与阅读策略转变有关的“快速”大脑可塑性过程相一致。
