The neural correlates of spatial language in English and American Sign Language: a PET study with hearing bilinguals
The neural correlates of spatial language in English and American Sign Language: a PET study with hearing bilinguals
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DOI：
10.1016/j.neuroimage.2004.10.008
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发表时间：
2005-02-01
期刊：
影响因子：
5.7
通讯作者：
Damasio, H
中科院分区：
文献类型：
--
作者：
Emmorey, K;Grabowski, T;Damasio, H
美国手语（ASL）并没有用一组封闭式的介词来指定空间关系，而是通过分类器构造使用空间本身来编码空间关系。在这些构造中，握手词素指定对象类型，并且手在签名空间中的位置示意性地表示对象之间的空间关系。进行了一项[O-15]水宠物研究，以调查与聋哑父母（Asl-English双语者）在听力受试者中生产英语介词和ASL定位分类器结构期间参与的神经区域。十个主题查看了描绘两个对象之间空间关系的线图，并被要求产生ASL位置分类器结构或描述空间关系的英语介词。比较任务是用ASL或英语命名图对象（彩色红色）。双侧描述ASL或英国订婚的顶叶皮层的空间关系。但是，一项相互作用的分析表明，ASL的右上顶层皮质比英语更大程度地参与了ASL。我们建议正确的顶壁皮层参与ASL所需的视觉动感转换。英语介词和ASL名词的生产比ASL分类器结构更大程度地吸引了Broca的区域。我们建议不参与Broca的区域，因为这些结构不涉及检索对象的名称或空间关系的名称。最后，在相同的任务条件下，仅观察到单语英语的人会产生空间介词的左边壁激活（H. Damasio等，2001，Neuroimage，13）。我们得出的结论是，对于Asl-English双语者观察到的右半球激活是由于他们在ASL中使用空间语言的终生经验。 （c）2004 Elsevier Inc.保留所有权利。
Rather than specifying spatial relations with a closed-class set of prepositions, American Sign Language (ASL) encodes spatial relations using space itself via classifier constructions. In these constructions, handshape morphemes specify object type, and the position of the hands in signing space schematically represents the spatial relation between objects. A [O-15]water PET study was conducted to investigate the neural regions engaged during the production of English prepositions and ASL locative classifier constructions in hearing subjects with deaf parents (ASL-English bilinguals). Ten subjects viewed line drawings depicting a spatial relation between two objects and were asked to produce either an ASL locative classifier construction or an English preposition that described the spatial relation. The comparison task was to name the figure object (colored red) in either ASL or in English. Describing spatial relations in either ASL or English engaged parietal cortex bilaterally. However, an interaction analysis revealed that right superior parietal cortex was engaged to a greater extent for ASL than for English. We propose that right parietal cortex is involved in the visual-motoric transformation required for ASL. The production of both English prepositions and ASL nouns engaged Broca's area to a greater extent than ASL classifier constructions. We suggest that Broca's area is not engaged because these constructions do not involve retrieval of the name of an object or the name of a spatial relation. Finally, under the same task conditions, only left parietal activation was observed for monolingual English speakers producing spatial prepositions (H. Damasio et al., 2001, NeuroImage, 13). We conclude that the right hemisphere activation observed for ASL-English bilinguals was due to their lifelong experience with spatial language in ASL. (C) 2004 Elsevier Inc. All rights reserved.