在中年大脑中,语音表达的神经区别性减少
Zhe-Chen Guo1, Jacie R McHaney1, Aravindakshan Parthasarathy2
1Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, USA.
Neurobiology of language (Cambridge, Mass.)
|August 7, 2025
概括
中年成年人经历了语音声音的"模糊"的大脑表现,影响了语音感知. 这种与年龄有关的神经脱差甚至发生在正常听力中,影响大脑如何处理语言.
科学领域:
- 神经科学是一个神经科学.
- 听觉神经科学 听觉神经科学
- 认知老龄化 认知老龄化
背景情况:
- 在中年,尽管听力值正常,但语音感知却在下降.
- 与年龄相关的语言感知变化背后的神经生物学机制尚不清楚.
- 与年龄相关的神经脱差假设表明皮质区分能力减少.
研究的目的:
- 为了研究皮质语音声音表现的与年龄相关的差异.
- 为了测试中年成年人神经脱差的假设.
- 探索耳神经退化和皮质处理之间的联系.
主要方法:
- 测量了对连续语音中的音符的电脑电图 (EEG) 反应.
- 使用神经网络分类器来从EEG预测音符.
- 进行了听力学,电生理学和语音感知测试.
- 对神经反应进行了代表性相似性分析.
主要成果:
- 中年成年人显示,来自EEG的语音预测不那么准确,更不确定.
- 在中年,皮层表现不那么明显,涉及到更广泛的神经网络.
- 与年龄有关的神经脱差与耳神经退化 (CND) 和语音缺陷相关.
结论:
- 中年与"模糊"的皮质声学表示有关.
- 与年龄相关的神经脱差有助于中年语音感知困难.
- 这些变化独立于听力测试听力值发生.
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