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尽管个体在出生时就没有左颞上回,但仍具有完整的阅读能力,尽管缺乏规范的视觉词形区。

Intact reading ability despite lacking a canonical visual word form area in an individual born without the left superior temporal lobe.

机构信息

Department of Psychology, The Ohio State University, Columbus, OH, USA.

Department of Brain and Cognitive Sciences / McGovern Institute for Brain Research, MIT, Cambridge, MA, USA.

出版信息

Cogn Neuropsychol. 2022 Jul-Dec;39(5-8):249-275. doi: 10.1080/02643294.2023.2164923. Epub 2023 Jan 18.

Abstract

The visual word form area (VWFA), a region canonically located within left ventral temporal cortex (VTC), is specialized for orthography in literate adults presumbly due to its connectivity with frontotemporal language regions. But is a typical, left-lateralized language network critical for the VWFA's emergence? We investigated this question in an individual (EG) born without the left superior temporal lobe but who has normal reading ability. EG showed canonical typical face-selectivity bilateraly but no wordselectivity either in right VWFA or in the spared left VWFA. Moreover, in contrast with the idea that the VWFA is simply part of the language network, no part of EG's VTC showed selectivity to higher-level linguistic processing. Interestingly, EG's VWFA showed reliable multivariate patterns that distinguished words from other categories. These results suggest that a typical left-hemisphere language network is necessary for acanonical VWFA, and that orthographic processing can otherwise be supported by a distributed neural code.

摘要

视觉词形区(VWFA)位于左侧腹侧颞叶皮层(VTC)内,在识字成年人中专门用于正字法,可能是因为它与额颞语言区域的连接。但是,典型的左侧语言网络对于 VWFA 的出现至关重要吗?我们在一个没有左侧上颞叶但具有正常阅读能力的个体(EG)中研究了这个问题。EG 双侧表现出典型的面孔选择性,但在右侧 VWFA 或未受损的左侧 VWFA 中均未表现出词选择性。此外,与 VWFA 只是语言网络的一部分的观点相反,EG 的 VTC 没有任何部分对高级语言处理具有选择性。有趣的是,EG 的 VWFA 显示出可靠的多元模式,可以区分单词和其他类别。这些结果表明,典型的左侧半球语言网络对于典型的 VWFA 是必要的,并且其他形式的正字法处理可以由分布式神经编码来支持。

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