Effects of deafness and sign language experience on the human brain: voxel-based and surface-based morphometry

被引：7

作者：

McCullough, Stephen ^{[1
]}

Emmorey, Karen ^{[1
]}

机构：

[1] San Diego State Univ, Lab Language & Cognit Neurosci, San Diego, CA 92182 USA

来源：

LANGUAGE COGNITION AND NEUROSCIENCE | 2021年 / 36卷 / 04期

基金：

美国国家卫生研究院;

关键词：

Deafness; auditory cortex; sign language; bimodal bilingualism‌ voxel-based and surface-based brain morphometry;

D O I：

10.1080/23273798.2020.1854793

中图分类号：

R36 [病理学]; R76 [耳鼻咽喉科学];

学科分类号：

100104 ; 100213 ;

摘要：

We investigated how deafness and sign language experience affect the human brain by comparing neuroanatomical structures across congenitally deaf signers (n = 30), hearing native signers (n = 30), and hearing sign-naive controls (n = 30). Both voxel-based and surface-based morphometry results revealed deafness-related structural changes in visual cortices (grey matter), right frontal lobe (gyrification), and left Heschl's gyrus (white matter). The comparisons also revealed changes associated with lifelong signing experience: expansions in the surface area within left anterior temporal and left occipital lobes, and a reduction in cortical thickness in the right occipital lobe for deaf and hearing signers. Structural changes within these brain regions may be related to adaptations in the neural networks involved in processing signed language (e.g. visual perception of face and body movements). Hearing native signers also had unique neuroanatomical changes (e.g. reduced gyrification in premotor areas), perhaps due to lifelong experience with both a spoken and a signed language.

引用

页码：422 / 439

页数：18

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