A Neurophysiological Study of Musical Pitch Identification in Mandarin-Speaking Cochlear Implant Users
A Neurophysiological Study of Musical Pitch Identification in Mandarin-Speaking Cochlear Implant Users
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普通话人工耳蜗使用者音乐音高识别的神经生理学研究
DOI：
10.1155/2020/4576729
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发表时间：
2020-07-22
影响因子：
3.1
通讯作者：
Zhang, Hongzheng
中科院分区：
文献类型：
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作者：
Cai, Jieqing;Liu, Yimeng;Zhang, Hongzheng
人工耳蜗（CI）用户的音乐感知是远远不能令人满意的，这不仅是因为目前的CI设备的技术限制，而且还由于神经生理学的改变，通常伴随着耳聋。早期的行为研究表明，在基于CI的电听觉中，音乐和词汇音高感知的基础是类似的机制。虽然神经生理学研究的音乐音高感知的英语CI用户正在积极进行中，很少有这样的研究已经进行了与普通话CI用户，普通话是一种音调的语言，这些人需要音高信息来理解语音。本研究旨在探讨普通话CI使用者和听力正常者音高识别能力的神经生理机制。行为和失配负波（MMN）的数据进行了分析，以检查音高处理性能。此外，从CI用户的神经生理学结果与好的和坏的音高辨别性能（根据刚刚可察觉的差异（JND）和音高方向辨别（PDD）的任务）进行了比较，以确定与音乐音高感知差异相关的皮层反应。MMN实验使用被动oddball范例进行，其中乐音C4（262 Hz）呈现为标准，并且乐音D4（294 Hz）、E4（330 Hz）、G#4（415 Hz）和C5（523 Hz）呈现为偏差。CI用户表现出更差的音乐音高辨别能力比NH听众，反映了较大的JND和PDD阈值的音高识别，并显着增加lavernity和MMN响应的幅度降低。好的CI执行者比差的执行者有更好的MMN结果。与英语为母语的CI用户的研究结果一致，这项工作的结果表明，MMN是一个可行的标记皮层音高感知在普通话为母语的CI用户。
Music perception in cochlear implant (CI) users is far from satisfactory, not only because of the technological limitations of current CI devices but also due to the neurophysiological alterations that generally accompany deafness. Early behavioral studies revealed that similar mechanisms underlie musical and lexical pitch perception in CI-based electric hearing. Although neurophysiological studies of the musical pitch perception of English-speaking CI users are actively ongoing, little such research has been conducted with Mandarin-speaking CI users; as Mandarin is a tonal language, these individuals require pitch information to understand speech. The aim of this work was to study the neurophysiological mechanisms accounting for the musical pitch identification abilities of Mandarin-speaking CI users and normal-hearing (NH) listeners. Behavioral and mismatch negativity (MMN) data were analyzed to examine musical pitch processing performance. Moreover, neurophysiological results from CI users with good and bad pitch discrimination performance (according to the just-noticeable differences (JND) and pitch-direction discrimination (PDD) tasks) were compared to identify cortical responses associated with musical pitch perception differences. The MMN experiment was conducted using a passive oddball paradigm, with musical tone C4 (262 Hz) presented as the standard and tones D4 (294 Hz), E4 (330 Hz), G#4 (415 Hz), and C5 (523 Hz) presented as deviants. CI users demonstrated worse musical pitch discrimination ability than did NH listeners, as reflected by larger JND and PDD thresholds for pitch identification, and significantly increased latencies and reduced amplitudes in MMN responses. Good CI performers had better MMN results than did bad performers. Consistent with findings for English-speaking CI users, the results of this work suggest that MMN is a viable marker of cortical pitch perception in Mandarin-speaking CI users.