当前位置: X-MOL 学术Neuroscience › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Context-dependent Plasticity and Strength of Subcortical Encoding of Musical Sounds Independently Underlie Pitch Discrimination for Music Melodies
Neuroscience ( IF 3.3 ) Pub Date : 2021-08-03 , DOI: 10.1016/j.neuroscience.2021.07.032
Xiaochen Zhang 1 , Qin Gong 2
Affiliation  

Subcortical auditory nuclei contribute to pitch perception, but how subcortical sound encoding is related to pitch processing for music perception remains unclear. Conventionally, enhanced subcortical sound encoding is considered underlying superior pitch discrimination. However, associations between superior auditory perception and the context-dependent plasticity of subcortical sound encoding are also documented. Here, we explored the subcortical neural correlates to music pitch perception by analyzing frequency-following responses (FFRs) to musical sounds presented in a predictable context and a random context. We found that the FFR inter-trial phase-locking (ITPL) was negatively correlated with behavioral performances of discrimination of pitches in music melodies. It was also negatively correlated with the plasticity indices measuring the variability of FFRs to physically identical sounds between the two contexts. The plasticity indices were consistently positively correlated with pitch discrimination performances, suggesting the subcortical context-dependent plasticity underlying music pitch perception. Moreover, the raw FFR spectral strength was not significantly correlated with pitch discrimination performances. However, it was positively correlated with behavioral performances when the FFR ITPL was controlled by partial correlations, suggesting that the strength of subcortical sound encoding underlies music pitch perception. When the spectral strength was controlled by partial correlations, the negative ITPL-behavioral correlations were maintained. Furthermore, the FFR ITPL, the plasticity indices, and the FFR spectral strength were more correlated with pitch than with rhythm discrimination performances. These findings suggest that the context-dependent plasticity and the strength of subcortical encoding of musical sounds are independently and perhaps specifically associated with pitch perception for music melodies.



中文翻译:

音乐声音皮层下编码的上下文相关可塑性和强度独立地成为音乐旋律音高辨别的基础

皮层下听觉核有助于音调感知,但皮层下声音编码如何与音乐感知的音调处理相关仍不清楚。传统上,增强的皮层下声音编码被认为是优越的音高辨别的基础。然而,卓越的听觉感知与皮质下声音编码的上下文相关可塑性之间的关联也被记录在案。在这里,我们通过分析对可预测上下文和随机上下文中呈现的音乐声音的频率跟随响应 (FFR) 来探索与音乐音调感知相关的皮层下神经。我们发现 FFR 试验间锁相 (ITPL) 与音乐旋律中音高辨别的行为表现呈负相关。它也与测量 FFR 对两种环境之间物理相同声音的可变性的可塑性指数呈负相关。可塑性指数始终与音高辨别性能呈正相关,表明音乐音高感知背后的皮质下上下文相关可塑性。此外,原始 FFR 光谱强度与音高辨别性能没有显着相关性。然而,当 FFR ITPL 受偏相关控制时,它与行为表现呈正相关,这表明皮层下声音编码的强度是音乐音调感知的基础。当谱强度由偏相关控制时,负的 ITPL 行为相关性得以保持。此外,FFR ITPL、塑性指数、并且 FFR 谱强度与音高的相关性高于与节奏辨别性能的相关性。这些发现表明,音乐声音的上下文相关可塑性和皮层下编码的强度是独立的,并且可能与音乐旋律的音高感知有关。

更新日期:2021-08-16
down
wechat
bug