Loudness perception and late auditory evoked potentials in adult cochlear implant users
Loudness perception and late auditory evoked potentials in adult cochlear implant users
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DOI：
10.1080/010503901300112239
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发表时间：
2001-01-01
期刊：
影响因子：
--
通讯作者：
Eysholdt, U
中科院分区：
文献类型：
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作者：
Hoppe, U;Rosanowski, F;Eysholdt, U
在临床常规中，人工耳蜗用户的语音处理器的调整是基于患者对特定电刺激响度的主观陈述。从听力患者那里得知，听觉皮层内产生的晚期听觉诱发电位（LAEP）的潜伏期和振幅与声刺激的响度感知相关。本研究的目的是调查成年人工耳蜗使用者的 LAEP 与响度感知之间的相关性。我们调查了 8 名成年受试者，他们在调查前至少 6 个月接受了 22 电极人工耳蜗 (nucleus (R) CI24M)。所有受试者都表现出开放的言语理解能力。在单个电极上呈现的持续时间为 300 毫秒的电脉冲序列用作刺激。 LAEP 电学形态与正常听力受试者相似。在所有受试者和每个耳蜗内电极位置中，LAEP 在低响度感觉下都可以很好地识别。幅度和延迟都取决于响度感知。观察到 N1 偏转的最佳相关性。结果表明，LAEP 可用于估计听力阈值和最舒适水平。
In clinical routine the adjustment of speech processors in cochlear implant users is based on the patients' subjective statements about the loudness of specific electrical stimuli. From hearing patients it is known that the latencies and amplitudes of late auditory evoked potentials (LAEP) which are generated within the auditory cortex correlate with the loudness perception of acoustical stimuli. The aim of this study was to investigate the correlation between LAEP and loudness perception in adult cochlear implant users. We investigated 8 adult subjects who had been provided with a 22 electrode Cochlear Implant (nucleus (R) CI24M) at least 6 months prior to the investigation. All subjects showed open speech understanding. Electrical pulse trains of 300 ms duration presented at a single electrode served as stimuli. Electrically LAEP morphologies were similar to normal hearing subjects. In all subjects and each intracochlear electrode position LAEP were well identifiable down to low loudness sensations. Both amplitudes and latencies depended on the loudness perception. The best correlation was observed for the N1 deflection. The results show that LAEP can be used for estimation of both hearing thresholds and most comfortable levels.