Orthographic and phonological selectivity across the reading system in deaf skilled readers.
Orthographic and phonological selectivity across the reading system in deaf skilled readers.
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DOI：
10.1016/j.neuropsychologia.2018.07.010
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发表时间：
2018-08
期刊：
影响因子：
2.6
通讯作者：
Emmorey K
中科院分区：
文献类型：
--
作者：
Glezer LS;Weisberg J;O'Grady Farnady C;McCullough S;Midgley KJ;Holcomb PJ;Emmorey K
天生耳聋的人在学习阅读方面往往有困难。最近，几项研究对聋人阅读的神经基础进行了研究，发现聋人的左侧阅读系统与正常人相似，涉及颞顶、下额叶和腹侧枕颞皮质。先前对典型听力读者的研究表明，在这个阅读网络中，有专门处理拼写和语音的独立区域。我们使用功能磁共振成像快速适应聋人谁是熟练的读者，检查神经选择性在左半球的三个功能ROI：颞顶皮层（TPC），额下回（IFG），和视觉词形区（VWFA）。结果表明，在聋人熟练的读者，左VWFA显示选择性的正字法类似于已报告的听力读者，TPC表现出较低的敏感性，语音比以前报告的听力读者使用相同的范式，IFG显示选择性的正字法，但不是语音（类似于以前已报告的听力读者）。这些结果提供的证据表明，虽然熟练的聋人读者表现出粗调的语音表示在TPC，他们开发微调表示的正字法的书面文字在VWFA和IFG。这一结果表明，语音调谐在TPC可能有与熟练的阅读聋人成年人的神经网络的影响不大。
People who are born deaf often have difficulty learning to read. Recently, several studies have examined the neural substrates involved in reading in deaf people and found a left lateralized reading system similar to hearing people involving temporoparietal, inferior frontal, and ventral occipito-temporal cortices. Previous studies in typical hearing readers show that within this reading network there are separate regions that specialize in processing orthography and phonology. We used fMRI rapid adaptation in deaf adults who were skilled readers to examine neural selectivity in three functional ROIs in the left hemisphere: temporoparietal cortex (TPC), inferior frontal gyrus (IFG), and the visual word form area (VWFA). Results show that in deaf skilled readers, the left VWFA showed selectivity for orthography similar to what has been reported for hearing readers, the TPC showed less sensitivity to phonology than previously reported for hearing readers using the same paradigm, and the IFG showed selectivity to orthography, but not phonology (similar to what has been reported previously for hearing readers). These results provide evidence that while skilled deaf readers demonstrate coarsely tuned phonological representations in the TPC, they develop finely tuned representations for the orthography of written words in the VWFA and IFG. This result suggests that phonological tuning in the TPC may have little impact on the neural network associated with skilled reading for deaf adults.
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