Learning new sounds of speech: reallocation of neural substrates
Learning new sounds of speech: reallocation of neural substrates
复制标题
DOI：
10.1016/j.neuroimage.2003.09.071
复制
发表时间：
2004-02-01
期刊：
影响因子：
5.7
通讯作者：
Zatorre, RJ
中科院分区：
文献类型：
--
作者：
Golestani, N;Zatorre, RJ
使用功能磁共振成像(FMRI)研究与语音学习相关的大脑活动的变化。10名只会说英语的受试者在进行五次印地语牙齿卷曲对比训练之前和之后的辨认任务时进行了扫描。在行为上，训练提高了辨别非本土对比的能力。成像结果表明，成功地学习非母语语音对比会导致与母语对比加工过程中涉及的相同区域的招募，包括左侧颞上回、岛-额盖和额下回。此外，行为改善与训练后印地语任务中获得的血氧水平依赖(BOLD)信号之间的相关性分析结果表明，学习的成功程度伴随着经典额叶语音区域更有效的神经处理，以及与噪声基线条件相比，左侧顶颞语音区域的去激活减少。(C)2003 Elsevier Inc.保留所有权利。
Functional magnetic resonance imaging (fMRI) was used to investigate changes in brain activity related to phonetic learning. Ten monolingual English-speaking subjects were scanned while performing an identification task both before and after five sessions of training with a Hindi dental-retroflex nonnative contrast. Behaviorally, training resulted in an improvement in the ability to identify the nonnative contrast. Imaging results suggest that the successful learning of a nonnative phonetic contrast results in the recruitment of the same areas that are involved during the processing of native contrasts, including the left superior temporal gyrus, insula-frontal operculum, and inferior frontal gyrus. Additionally, results of correlational analyses between behavioral improvement and the blood-oxygenation-level-dependent (BOLD) signal obtained during the posttraining Hindi task suggest that the degree of success in learning is accompanied by more efficient neural processing in classical frontal speech regions, and by a reduction of deactivation relative to a noise baseline condition in left parietotemporal speech regions. (C) 2003 Elsevier Inc. All rights reserved.