Neural systems underlying spatial language in American Sign Language
Neural systems underlying spatial language in American Sign Language
复制标题
DOI：
10.1006/nimg.2002.1187
复制
发表时间：
2002-10-01
期刊：
影响因子：
5.7
通讯作者：
Bellugi, U
中科院分区：
文献类型：
--
作者：
Emmorey, K;Damasio, H;Bellugi, U
一项[0 -15]水PET实验研究了参与处理手语独特结构的神经区域：手部在签名空间中的位置图式地表示物体之间的空间关系的分类器谓词。10名聋哑人观看描绘两个物体之间空间关系的线条图（例如，桌子上的杯子），并被要求产生一个分类结构或一个描述空间关系的美国手语（ASL）介词，或命名图形物体（红色）。与命名物体相比，用分类器结构描述空间关系涉及两个半球的边缘上回（SMG）。与命名物体相比，用美国手语介词命名空间关系只需要使用正确的SMG。先前的研究表明，英语介词的检索同时涉及到左右侧SMG，但比美国手语分类器结构的检索效果要差。与美国手语介词相比，用分类结构命名空间关系涉及左颞下皮层，这一区域在用美国手语或英语命名具体物体时都被激活。左IT可能会参与，因为分类器结构中的手形编码了关于对象类型的信息（例如，平面）。总的来说，研究结果表明，在使用美国手语表达空间关系时，更多的右半球参与其中，这可能是因为手语空间用于编码对象之间的空间关系。(C) 2002 Elsevier Science （USA）。
A [O-15]water PET experiment was conducted to investigate the neural regions engaged in processing constructions unique to signed languages: classifier predicates in which the position of the hands in signing space schematically represents spatial relations among objects. Ten deaf native signers viewed line drawings depicting a spatial relation between two objects (e.g., a cup on a table) and were asked either to produce a classifier construction or an American Sign Language (ASL) preposition that described the spatial relation or to name the figure object (colored red). Compared to naming objects, describing spatial relationships with classifier constructions engaged the supramarginal gyrus (SMG) within both hemispheres. Compared to naming objects, naming spatial relations with ASL prepositions engaged only the right SMG. Previous research indicates that retrieval of English prepositions engages both right and left SMG, but more inferiorly than for ASL classifier constructions. Compared to ASL prepositions, naming spatial relations with classifier constructions engaged left inferior temporal (IT) cortex, a region activated when naming concrete objects in either ASL or English. Left IT may be engaged because the handshapes in classifier constructions encode information about object type (e.g., flat surface). Overall, the results suggest more right hemisphere involvement when expressing spatial relations in ASL, perhaps because signing space is used to encode the spatial relationship between objects. (C) 2002 Elsevier Science (USA).