On-line plasticity in spoken sentence comprehension: Adapting to time-compressed speech
On-line plasticity in spoken sentence comprehension: Adapting to time-compressed speech
复制标题
DOI：
10.1016/j.neuroimage.2009.07.032
复制
发表时间：
2010-01-01
期刊：
影响因子：
5.7
通讯作者：
Devlin, Joseph T.
中科院分区：
文献类型：
--
作者：
Adank, Patti;Devlin, Joseph T.
听者在处理语音信号变化方面表现出显著的灵活性。一个引人注目的例子是，他们很容易适应新的语言扭曲，比如听带有外国口音的人说话。行为研究表明，理解能力的显著提高发生得很快——通常在10-20个句子之内。在本实验中，我们使用时间压缩语音来研究在线适应扭曲语音的神经变化。听众对正常语速和时间压缩的句子进行句子验证任务，同时用功能磁共振成像记录他们的神经反应。结果表明，时间压缩语音的快速学习发生在16个句子的第一个块的呈现过程中，并且与左右听觉关联皮层和左腹前运动皮层的激活增加有关。这些发现表明，适应扭曲语音信号的能力可能部分依赖于将新的声学模式映射到现有的发音运动计划上，这与语音感知涉及包括听觉和运动线索在内的多模态信息的整合的观点一致。(C) 2009爱思唯尔公司版权所有。
Listeners show remarkable flexibility in Processing variation in speech signal. One striking example is the ease with which they adapt to novel speech distortions such as listening to someone with a foreign accent. Behavioural studies suggest that significant improvements in comprehension Occur rapidly - often within 10-20 sentences. In the present experiment, we investigate the neural changes underlying on-line adaptation to distorted speech using time-compressed speech. Listeners performed a sentence verification task on normal-speed and time-compressed sentences while their neural responses were recorded using fMRI. The results showed that rapid learning of the time-compressed speech occurred during presentation of the first block of 16 sentences and was associated with increased activation in left and right auditory association cortices and in left ventral premotor Cortex. These findings suggest that the ability to adapt to a distorted speech signal may, in part, rely on mapping novel acoustic patterns onto existing articulatory motor plans, consistent with the idea that speech perception involves integrating multi-modal information including auditory and motoric cues. (C) 2009 Elsevier Inc. All rights reserved.