Cortical plasticity induced by rapid Hebbian learning of novel tonal word-forms: Evidence from mismatch negativity
Cortical plasticity induced by rapid Hebbian learning of novel tonal word-forms: Evidence from mismatch negativity
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DOI：
10.1016/j.bandl.2014.09.007
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发表时间：
2014-12-01
影响因子：
2.5
通讯作者：
Alter, Kai
中科院分区：
文献类型：
--
作者：
Yue, Jinxing;Bastiaanse, Roelien;Alter, Kai
虽然有一些实验报道了被动接触新音节模式会引起大脑皮层的快速可塑性，但很少有研究关注声调语言（如汉语）中新声调词形快速学习过程中的神经动力学。在当前的研究中，以普通话为母语的人被暴露在声学上匹配的真实和新颖的音段语调模式中。通过记录他们的失配负性（MMN）反应（口语长期记忆痕迹的ERP指标），我们发现相对于早期暴露阶段，在暴露后期，左半球区域对新词形的MMN增强。相比之下，在熟悉过程中，MMN对真实单词的反应没有明显变化。我们的研究结果表明，在人类新皮层中存在一种快速的Hebbian学习机制，该机制通过在片段和音调表征之间建立新的联系，为一种新的片段-音调模式发展长期记忆痕迹。(C) 2014爱思唯尔公司版权所有。
Although several experiments reported rapid cortical plasticity induced by passive exposure to novel segmental patterns, few studies have devoted attention to the neural dynamics during the rapid learning of novel tonal word-forms in tonal languages, such as Chinese. In the current study, native speakers of Mandarin Chinese were exposed to acoustically matched real and novel segment-tone patterns. By recording their Mismatch Negativity (MMN) responses (an ERP indicator of long-term memory traces for spoken words), we found enhanced MMNs to the novel word-forms over the left-hemispheric region in the late exposure phase relative to the early exposure phase. In contrast, no significant changes were identified in MMN responses to the real word during familiarisation. Our results suggest a rapid Hebbian learning mechanism in the human neocortex which develops long-term memory traces for a novel segment-tone pattern by establishing new associations between the segmental and tonal representations. (C) 2014 Elsevier Inc. All rights reserved.