Eun Kyung Jeon, Virginia Driscoll, Bruna S Mussoi, Rachel Scheperle, Emily Guthe, Kate Gfeller, Paul J Abbas, Carolyn J Brown
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引用次数: 0
Abstract
Objectives: To describe the effects of two types of auditory training on both behavioral and physiological measures of auditory function in cochlear implant (CI) users, and to examine whether a relationship exists between the behavioral and objective outcome measures.
Design: This study involved two experiments, both of which used a within-subject design. Outcome measures included behavioral and cortical electrophysiological measures of auditory processing. In Experiment I, 8 CI users participated in a music-based auditory training. The training program included both short training sessions completed in the laboratory as well as a set of 12 training sessions that participants completed at home over the course of a month. As part of the training program, study participants listened to a range of different musical stimuli and were asked to discriminate stimuli that differed in pitch or timbre and to identify melodic changes. Performance was assessed before training and at three intervals during and after training was completed. In Experiment II, 20 CI users participated in a more focused auditory training task: the detection of spectral ripple modulation depth. Training consisted of a single 40-minute session that took place in the laboratory under the supervision of the investigators. Behavioral and physiologic measures of spectral ripple modulation depth detection were obtained immediately pre- and post-training. Data from both experiments were analyzed using mixed linear regressions, paired t tests, correlations, and descriptive statistics.
Results: In Experiment I, there was a significant improvement in behavioral measures of pitch discrimination after the study participants completed the laboratory and home-based training sessions. There was no significant effect of training on electrophysiologic measures of the auditory N1-P2 onset response and acoustic change complex (ACC). There were no significant relationships between electrophysiologic measures and behavioral outcomes after the month-long training. In Experiment II, there was no significant effect of training on the ACC, although there was a small but significant improvement in behavioral spectral ripple modulation depth thresholds after the short-term training.
Conclusions: This study demonstrates that auditory training improves spectral cue perception in CI users, with significant perceptual gains observed despite cortical electrophysiological responses like the ACC not reliably predicting training benefits across short- and long-term interventions. Future research should further explore individual factors that may lead to greater benefit from auditory training, in addition to optimization of training protocols and outcome measures, as well as demonstrate the generalizability of these findings.
目的描述两种类型的听觉训练对人工耳蜗(CI)使用者听觉功能的行为和生理测量的影响,并研究行为和客观结果测量之间是否存在关系:本研究包括两项实验,均采用受试者内设计。结果测量包括听觉处理的行为和皮层电生理测量。在实验一中,8 名 CI 用户参加了以音乐为基础的听觉训练。训练项目包括在实验室完成的短期训练课,以及参与者在家完成的为期一个月、共 12 节的训练课。作为训练计划的一部分,研究人员聆听了一系列不同的音乐刺激,并被要求辨别音高或音色不同的刺激,以及识别旋律的变化。在训练前以及训练期间和训练结束后的三个时间间隔内对学员的表现进行评估。在实验二中,20 名 CI 用户参加了一项重点更突出的听觉训练任务:检测频谱波纹调制深度。训练在研究人员的监督下于实验室内进行,单次训练时间为 40 分钟。训练前和训练后立即对频谱波纹调制深度检测进行行为和生理测量。两个实验的数据均采用混合线性回归、配对 t 检验、相关性和描述性统计进行分析:结果:在实验 I 中,参与者在完成实验室和家庭培训课程后,音调辨别的行为测量有了显著改善。训练对听觉 N1-P2 起始反应和声变化复合体(ACC)的电生理测量没有明显影响。在为期一个月的训练后,电生理指标和行为结果之间没有明显的关系。在实验二中,虽然短期培训后行为频谱波纹调制深度阈值有了微小但显著的改善,但训练对 ACC 没有显著影响:本研究表明,听觉训练可提高 CI 使用者的频谱线索感知能力,尽管大脑皮层电生理反应(如 ACC)不能可靠地预测短期和长期干预的训练效果,但仍可观察到明显的感知提高。未来的研究除了优化训练方案和结果测量之外,还应进一步探讨可能导致听觉训练产生更大益处的个体因素,并证明这些发现的普遍性。
期刊介绍:
From the basic science of hearing and balance disorders to auditory electrophysiology to amplification and the psychological factors of hearing loss, Ear and Hearing covers all aspects of auditory and vestibular disorders. This multidisciplinary journal consolidates the various factors that contribute to identification, remediation, and audiologic and vestibular rehabilitation. It is the one journal that serves the diverse interest of all members of this professional community -- otologists, audiologists, educators, and to those involved in the design, manufacture, and distribution of amplification systems. The original articles published in the journal focus on assessment, diagnosis, and management of auditory and vestibular disorders.