Neural correlates of fingerspelling, text, and sign processing in deaf American Sign Language-English bilinguals
Neural correlates of fingerspelling, text, and sign processing in deaf American Sign Language-English bilinguals
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DOI：
10.1080/23273798.2015.1014924
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发表时间：
2015-07-03
影响因子：
2.3
通讯作者：
Weisberg, Jill
中科院分区：
文献类型：
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作者：
Emmorey, Karen;McCullough, Stephen;Weisberg, Jill
我们使用功能性磁共振成像来识别支持手语-英语双语聋人理解手指拼写单词、印刷单词和美国手语（ASL）符号的神经区域。参与者对每种词汇类型进行语义判断（具体-抽象？），听力正常的非手语者作为对照。所有三种词汇类型都涉及与词汇语义处理相关的左额颞回路。印刷体和手写体的单词都激活了聋哑人的视觉单词形成区。与手语相比，用手指拼写的单词更偏左，这与阅读和听口语之间的差异相当。与用手指拼写单词相比，左边缘上脑回对符号的激活更大，支持其在处理符号特定音韵学中的作用。拼写能力与左枕叶皮层激活呈负相关，而美国手语能力与右角回激活呈负相关。总的来说，结果揭示了重叠和不同的神经区域的理解符号，文本，和拼写。
We used functional magnetic resonance imaging to identify the neural regions that support comprehension of fingerspelled words, printed words, and American Sign Language (ASL) signs in deaf ASL-English bilinguals. Participants made semantic judgements (concrete-abstract?) to each lexical type, and hearing non-signers served as controls. All three lexical types engaged a left frontotemporal circuit associated with lexical semantic processing. Both printed and fingerspelled words activated the visual word form area for deaf signers only. Fingerspelled words were more left lateralised than signs, paralleling the difference between reading and listening for spoken language. Greater activation in left supramarginal gyrus was observed for signs compared to fingerspelled words, supporting its role in processing sign-specific phonology. Fingerspelling ability was negatively correlated with activation in left occipital cortex, while ASL ability was negatively correlated with activation in right angular gyrus. Overall, the results reveal both overlapping and distinct neural regions for comprehension of signs, text, and fingerspelling.