听力正常的听者和具有对侧声学听力的人工耳蜗使用者的听觉皮层诱发反应会受到听侧时间错配的影响

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Hanna Dolhopiatenko , Manuel Segovia-Martinez , Waldo Nogueira
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引用次数: 0

摘要

将人工耳蜗与对侧声学听力相结合通常能提高言语理解能力,但这种提高在人工耳蜗使用者之间存在差异,并可能导致干扰效应。这种差异可能与电刺激和声刺激之间的整合效果有关,而这种整合效果可能会受到两侧听力的时间不匹配影响。本研究调查了听力正常的听者(NH)和具有对侧声学听力的 CI 使用者的皮层听觉诱发电位(CAEPs)。在单耳、双耳和双耳时间不匹配条件下,分析了正常听力者的 N1 峰值振幅和最大锁相值 (PLV)。在 CI 使用者中,测量了仅使用 CI 聆听(CIS_only)、仅使用声学聆听(AS_only)和双侧一起聆听(CIS+AS)时的 CAEP。在使用 CIS+AS 聆听时,在电刺激和声刺激之间引入了不同的耳间延迟。在 NH 聆听者中,耳间时间不匹配导致 N1 振幅和 PLV 下降。此外,PLV 被认为是研究两侧听力信息整合的更灵敏的测量方法。CI 用户在仅 AS 和仅 CIS 的听力条件下表现出不同的 N1 延迟,当时间不匹配得到补偿时,N1 振幅增加。这项研究强调了 CAEPs 测量在研究 NH 和双模 CI 使用者大脑皮层处理两侧听力信息方面的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The temporal mismatch across listening sides affects cortical auditory evoked responses in normal hearing listeners and cochlear implant users with contralateral acoustic hearing

Combining a cochlear implant with contralateral acoustic hearing typically enhances speech understanding, although this improvement varies among CI users and can lead to an interference effect. This variability may be associated with the effectiveness of the integration between electric and acoustic stimulation, which might be affected by the temporal mismatch between the two listening sides. Finding methods to compensate for the temporal mismatch might contribute to the optimal adjustment of bimodal devices and to improve hearing in CI users with contralateral acoustic hearing.

The current study investigates cortical auditory evoked potentials (CAEPs) in normal hearing listeners (NH) and CI users with contralateral acoustic hearing. In NH, the amplitude of the N1 peak and the maximum phase locking value (PLV) were analyzed under monaural, binaural, and binaural temporally mismatched conditions. In CI users, CAEPs were measured when listening with CI only (CIS_only), acoustically only (AS_only) and with both sides together (CIS+AS). When listening with CIS+AS, various interaural delays were introduced between the electric and acoustic stimuli.

In NH listeners, interaural temporal mismatch resulted in decreased N1 amplitude and PLV. Moreover, PLV is suggested as a more sensitive measure to investigate the integration of information between the two listening sides.

CI users showed varied N1 latencies between the AS_only and CIS_only listening conditions, with increased N1 amplitude when the temporal mismatch was compensated. A tendency towards increased PLV was also observed, however, to a lesser extent than in NH listeners, suggesting a limited integration between electric and acoustic stimulation.

This work highlights the potential of CAEPs measurement to investigate cortical processing of the information between two listening sides in NH and bimodal CI users.

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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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