The Music of Silence: Part I: Responses to Musical Imagery Encode Melodic Expectations and Acoustics
The Music of Silence: Part I: Responses to Musical Imagery Encode Melodic Expectations and Acoustics
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DOI：
10.1523/jneurosci.0183-21.2021
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发表时间：
2021-09-01
影响因子：
5.3
通讯作者：
Shamma, Shihab A.
中科院分区：
文献类型：
--
作者：
Marion, Guilhem;Liberto, Giovanni M. Di;Shamma, Shihab A.
音乐意象是指在不需要身体动作或外部刺激的情况下，在头脑中自发地对音乐进行内部听觉。许多研究已经揭示了在想象过程中激活的大脑区域。然而，它仍然不清楚在多大程度上想象的音乐反应保留详细的时间动态的声学刺激信封，至关重要的是，旋律的期望是否发挥任何作用，在调制反应想象的音乐，因为他们突出在听。这些调制是重要的，因为它们反映了人类音乐体验的各个方面，例如它的获取，参与和享受。本研究探讨了这些调制的性质，在想象音乐的基础上，从21个专业音乐家（6名女性和15名男性）的EEG记录。进行回归分析，以证明想象的神经信号可以准确地预测，类似于听力任务，并且足够鲁棒，以允许从EEG准确识别想象的音乐作品。在这样做，我们的研究结果表明，图像和听力任务引起重叠，但独特的地形的神经反应，声音声学，这是符合以前的功能磁共振成像文献。然而，旋律的期望，在这两种情况下，引起非常相似的额叶空间激活，这表明他们是由相同的潜在机制支持。最后，由想象引起的神经反应表现出从听觉条件的特定转换，其中主要包括相对延迟和极性反转的反应。这种转变表明，自上而下的预测性质的预期机制，在听力和图像。
Musical imagery is the voluntary internal hearing of music in the mind without the need for physical action or external stimulation. Numerous studies have already revealed brain areas activated during imagery. However, it remains unclear to what extent imagined music responses preserve the detailed temporal dynamics of the acoustic stimulus envelope and, crucially, whether melodic expectations play any role in modulating responses to imagined music, as they prominently do during listening. These modulations are important as they reflect aspects of the human musical experience, such as its acquisition, engagement, and enjoyment. This study explored the nature of these modulations in imagined music based on EEG recordings from 21 professional musicians (6 females and 15 males). Regression analyses were conducted to demonstrate that imagined neural signals can be predicted accurately, similarly to the listening task, and were sufficiently robust to allow for accurate identification of the imagined musical piece from the EEG. In doing so, our results indicate that imagery and listening tasks elicited an overlapping but distinctive topography of neural responses to sound acoustics, which is in line with previous fMRI literature. Melodic expectation, however, evoked very similar frontal spatial activation in both conditions, suggesting that they are supported by the same underlying mechanisms. Finally, neural responses induced by imagery exhibited a specific transformation from the listening condition, which primarily included a relative delay and a polarity inversion of the response. This transformation demonstrates the top-down predictive nature of the expectation mechanisms arising during both listening and imagery.