Mapping the reading circuitry for skilled deaf readers: An fMRI study of semantic and phonological processing
Mapping the reading circuitry for skilled deaf readers: An fMRI study of semantic and phonological processing
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DOI：
10.1016/j.bandl.2013.05.001
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发表时间：
2013-08-01
影响因子：
2.5
通讯作者：
Petrich, Jennifer A. F.
中科院分区：
文献类型：
--
作者：
Emmorey, Karen;Weisberg, Jill;Petrich, Jennifer A. F.
我们检查了以美国手语为主要语言的熟练聋人读者和阅读能力匹配的听力读者(大学水平)的单词水平阅读回路。在fMRI扫描中，参与者进行了语义判断(具体概念？)、语音判断(两个音节？)和错误字体控制任务(字符串下划线？)。两组人在语义任务上的表现相同，但听力读者在语音任务上的表现更好。在聋人和听力读者中，语义处理涉及到类似的左额颞叶语言回路。然而，与听力识别者相比，语音加工在聋人的左侧中央前回和双侧顶叶皮质引起了神经活动的增加，这表明更多地依赖发音语音代码，这表明语音加工的努力增加了。聋人读者在左侧前额下部皮质的语义和语音加工之间也表现出更强的前后功能分离。最后，较弱的语音解码能力不会改变聋人读者视觉词形区域的激活。(C)2013 Elsevier Inc.保留所有权利。
We examined word-level reading circuits in skilled deaf readers whose primary language is American Sign Language, and hearing readers matched for reading ability (college level). During fMRI scanning, participants performed a semantic decision (concrete concept?), a phonological decision (two syllables?), and a false-font control task (string underlined?). The groups performed equally well on the semantic task, but hearing readers performed better on the phonological task. Semantic processing engaged similar left frontotemporal language circuits in deaf and hearing readers. However, phonological processing elicited increased neural activity in deaf, relative to hearing readers, in the left precentral gyrus, suggesting greater reliance on articulatory phonological codes, and in bilateral parietal cortex, suggesting increased phonological processing effort. Deaf readers also showed stronger anterior-posterior functional segregation between semantic and phonological processes in left inferior prefrontal cortex. Finally, weaker phonological decoding ability did not alter activation in the visual word form area for deaf readers. (c) 2013 Elsevier Inc. All rights reserved.