...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The European Journal of Neuroscience >Alpha activity marking word boundaries mediates speech segmentation
【24h】

Alpha activity marking word boundaries mediates speech segmentation

机译：标记单词边界的Alpha活动介导语音分割

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study examined the neurophysiological mechanisms of speech segmentation, the process of parsing the continuous speech signal into isolated words. Individuals listened to sequences of two monosyllabic words (e.g. gas source) and non-words (e.g. nas sorf). When these phrases are spoken, talkers usually produce one continuous s-sound, not two distinct s-sounds, making it unclear where one word ends and the next one begins. This ambiguity in the signal can also result in perceptual ambiguity, causing the sequence to be heard as one word (failed to segment) or two words (segmented). We compared listeners' electroencephalogram activity when they reported hearing one word or two words, and found that bursts of fronto-central alpha activity (9-14 Hz), following the onset of the physical /s/ and end of phrase, indexed speech segmentation. Left-lateralized beta activity (14-18 Hz) following the end of phrase distinguished word from non-word segmentation. A hallmark of enhanced alpha activity is that it reflects inhibition of task-irrelevant neural populations. Thus, the current results suggest that disengagement of neural processes that become irrelevant as the words unfold marks word boundaries in continuous speech, leading to segmentation. Beta activity is likely associated with unifying word representations into coherent phrases.
机译：这项研究检查了语音分割的神经生理机制，即将连续语音信号解析为孤立词的过程。个人听了两个单音节单词（例如气源）和非单词（例如nas sorf）的序列。讲这些短语时，说话者通常会发出一个连续的声音，而不是发出两个不同的声音，因此不清楚一个单词在哪里结束而下一个单词在哪里开始。信号中的这种歧义也可能导致感知歧义，导致序列以一个单词（无法分段）或两个单词（已分段）的形式被听到。我们比较了听者报告听到一个单词或两个单词时他们的脑电图活动，发现物理/ s /的出现和短语结尾之后，额中央α活动突然爆发（9-14 Hz），索引了语音分段。短语结尾之后的左侧单词beta活动（14-18 Hz）将单词与非单词分割区分开。增强的α活性的标志是它反映了与任务无关的神经种群的抑制。因此，目前的结果表明，随着单词展开而变得无关紧要的神经过程的分离标记了连续语音中的单词边界，从而导致了分割。 Beta活动可能与将单词表示统一为连贯的短语有关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号