关于耳植入物模拟语音和辅音感知神经特征的双模式研究
Leqiang Cao1,2, Qi Zheng1,2, Yubo Wu1,2
1Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China.
Annals of the New York Academy of Sciences
|May 31, 2025
概括
耳植入物 (CI) 用户由于光谱损失而与语音感知作斗争. 这项研究揭示了CI模拟的语言需要大脑更大的努力,显示低效率感知和高认知负载.
科学领域:
- 听觉神经科学 听觉神经科学
- 语音感知 语音感知
- 神经成像是一种神经成像.
背景情况:
- 准确地感知词汇的音调和辅音对于理解音调语言至关重要.
- 耳植入物 (CI) 用户通常会因为CI处理中的光谱扭曲而经历语音感知减弱.
- 在CI使用者中,这种感知减弱的基础的神经机制尚未完全理解.
研究的目的:
- 在正常听觉的成年人中研究CI模拟的道化语音的神经处理.
- 在模拟CI条件下检查大脑对音调和辅音的反应.
- 阐明与处理退化语音信号相关的神经机制和认知负载.
主要方法:
- 在26名听力正常的成年人中同时使用脑电图 (EEG) 和功能近红外光谱 (fNIRS).
- 提供了CI模拟的道化语音和自然人声音 (NH) 的参与者.
- 分析了听觉唤起的潜能 (AEP),三角 (δ) 和三角 (θ) 波段的功能连接,以及在音调和辅音处理过程中基于fNIRS的脑激活.
主要成果:
- 与NH相比,AEP中道化语音的N1振幅明显较低,特别是T2和T4音调,表明知觉受损.
- 在 δ 和 θ 波段中减少神经同步,用于通道语音,特别是在右叶,观察到音调和辅音"za".
- 通过fNIRS增加右叶激活以引导语音,这表明听力努力和认知负载增加.
结论:
- CI模拟语音处理的特点是感知效率低,认知负载高,涉及补偿神经机制.
- 研究结果表明,用于道化语音的"低效率感知与高认知负载"的神经特征.
- 该研究为CI康复评估提供了潜在的神经生物标志物,并为听觉处理的未来研究方向提供了信息.
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