短期和长期的神经可塑性在并发语音的感知学习期间相互作用
Jessica MacLean1,2, Jack Stirn1, Alexandria Sisson1
1Department of Speech, Language and Hearing Sciences, Indiana University, Bloomington, IN, USA.
Cerebral cortex (New York, N.Y. : 1991)
|January 11, 2024
概括
音乐家和非音乐家都会学习语音,但音乐家表现出更快的决策. 大脑皮层中的听觉可塑性,而不是大脑干,通过相互作用的短期和长期机制驱动这种学习.
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
- 认知神经科学 认知神经科学
背景情况:
- 听觉体验塑造大脑的可塑性,影响声音编码和感知.
- 语音处理中的长期和短期可塑性之间的相互作用仍然未得到充分探索.
研究的目的:
- 调查神经机制和短期和长期神经可塑性的相互作用,同时语音的快速听觉感知学习.
- 为了比较这些机制在年轻,正常听觉的音乐家和非音乐家.
主要方法:
- 高密度脑电图 (EEG) 用于在45分钟的听觉感知学习任务中记录神经活动,其中包括双母音混合.
- 分析了频率跟踪响应 (FFR) 和事件相关潜力 (ERP),分别评估皮层下和皮层可塑性.
- 应用了源重建技术,以确定学习诱导的皮质变化的位置.
主要成果:
- 音乐家和非音乐家都表现出快速的感知学习,音乐家表现出更快的行为决策.
- 在脑干FFR中没有观察到与学习相关的显著变化.
- 皮质ERP揭示了群体之间明显的半球不对称性,表明不同的神经策略 (音乐家:右半球偏差;非音乐家:左半球).
- 学习诱导的皮质可塑性局部存在于150-200 ms的听觉感官区域.
结论:
- 语音的听觉感知学习依赖于长期和短期可塑性机制之间的相互作用.
- 皮质可塑性,以半球专业化为特征,在这个学习过程中起着至关重要的作用.
- 音乐能力为整个领域带来好处,可能是通过增强这些相互作用的可塑性机制.
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