主观偏好的八度大小是在大脑听觉处理的后期阶段解决的
Jussi Jaatinen1,2, Jani Väntänen2,3, Viljami Salmela2
1Musicology, Faculty of Arts, University of Helsinki, Helsinki, Finland.
The European journal of neuroscience
|September 26, 2023
概括
人类倾听者更喜欢略微放大的八度,这一现象通过脑电图 (EEG) 进行了探索. 神经反应表明,首选的八度大小在后来的听觉阶段被处理,使它们与精确或压缩的间隔区分开来.
科学领域:
- 听觉神经科学 听觉神经科学
- 精神声学是一种精神声学.
- 人类的感知 人类的感知
背景情况:
- 人类听众更喜欢八度间隔略大于精确的2:1频率比,称为八度放大.
- 了解这种主观偏好背后的神经机制对于听觉感知研究至关重要.
研究的目的:
- 通过比较大脑对各种八度间隔的反应来研究八度扩大现象的神经支柱.
- 为了确定神经处理是否在偏好的,确切的,扩大的和压缩的八度间隔中不同.
主要方法:
- 使用脑电图 (EEG) 进行了两项实验,对人类参与者进行了实验.
- 实验1涉及被动倾听一八度间隔,并分析了N1-P2事件相关潜力 (ERP).
- 实验2涉及音乐家积极倾听和评分四八度间隔,随后进行多变量模式分析 (MVPA).
主要成果:
- 与压缩和超大尺寸间隔相比,精确和放大八度的N1-P2振幅被减少,这表明神经表征重叠.
- 虽然早期的ERP (N1-P2) 并没有区分精确和首选的扩大八度,但后来的ERP确实如此.
- 在积极倾听实验中,MVPA区分了从200毫秒开始的八度类型,时间分类显示了大约300和700毫秒的不同过程.
结论:
- 对八度大小的主观偏好并不反映在早期的听觉处理阶段 (N1-P2幅度).
- 区分不同的八度类型,特别是与主观偏好相关的区分,似乎是在听觉处理的后期阶段发生的.
- 多变量模式分析表明,大脑需要积极参与才能解决主观八度偏好.
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