...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Neural correlates of partial lexical activation
【24h】

Neural correlates of partial lexical activation

机译：部分词汇激活的神经相关

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

As a spoken word unfolds over time, it is temporarily consistent with the acoustic forms of multiple words. Previous behavioral research has shown that, in the face of temporary ambiguity about how a word will end, multiple candidate words are briefly activated. Here, we provide neural imaging evidence that lexical candidates only temporarily consistent with the input activate perceptually based semantic representations. An artificial lexicon and novel visual environment were used to target human MT/V5 and an area anterior to it which have been shown to be recruited during the reading of motion words. Participants learned words that referred to novel objects and to motion or color/texture changes that the objects underwent. The lexical items corresponding to the change events were organized into phonologically similar pairs differing only in the final syllable. Upon hearing spoken scene descriptions in a posttraining verification task, participants showed greater activation in the left hemisphere anterior extent of MT/V5 when motion words were heard than when nonmotion words were heard. Importantly, when a nonmotion word was heard, the level of activation in the anterior extent of MT/V5 was modulated by whether there was a phonologically related competitor that was a motion word rather than another nonmotion word. These results provide evidence of activation of a perceptual brain region in response to the semantics of a word while lexical competition is in process and before the word is fully recognized.
机译：随着口头单词随着时间的流逝而发展，它暂时与多个单词的声学形式保持一致。先前的行为研究表明，面对关于单词将如何结束的暂时模糊性，会短暂激活多个候选单词。在这里，我们提供了神经影像证据，即仅与输入暂时一致的词汇候选者激活了基于感知的语义表示。使用人工词典和新颖的视觉环境来针对人类MT / V5及其前面的区域，这已被证明是在阅读动作单词时招募的。参加者学习了涉及新颖物体以及物体经历的运动或颜色/纹理变化的单词。对应于变化事件的词汇项目被组织成语音相似的对，仅在最后的音节上有所不同。在训练后验证任务中听到口语场景描述后，与未听见运动词相比，参与者在听见运动词时表现出更大的MT / V5左半球前部激活度。重要的是，当听到一个不动词时，MT / V5前部的激活水平由是否有一个语音相关的竞争者而不是另一个不动词来调节。这些结果提供了在词汇竞争过程中以及单词被完全识别之前，响应单词的语义而激活感知性大脑区域的证据。

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