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Effects of Context on Electrophysiological Response to Musical Accents

机译：语境对乐谱的电生理反应的影响

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Listeners' aesthetic and emotional responses to music typically occur in the context of long musical passages that contain structures defined in terms of the events that precede them. We describe an electrophysiological study of listeners' brain responses to musical accents that coincided in longer musical sequences. Musically trained lis-teners performed a timbre-change detection task in which a single-tone timbre change was positioned within 4-bar melodies composed of 350-ms tones to coincide or not with melodic contour accents and temporal accents (induced with temporal gaps). Event-related potential responses to (task-relevant) attended timbre changes elicited an early negativity (MMN/N2b) around 200 ms and a late positive component around 350 ms (P300), reflecting updating of the timbre change in working memory. The ampli-tudes of both components changed systematically across the sequence, consistent with expectancy-based context effects. Furthermore, melodic contour changes modulated the MMN/N2b response (but not the P300) to timbre changes in later sequence positions. In contrast, task-irrelevant temporal gaps elicited an MMN that was not modulated by position within the context; absence of a P300 indicated that temporal-gap accents were not updated in working memory. Listeners' neural responses to musical structure changed systematically as sequential predictability and listeners' expectations changed across the melodic context.
机译：听众的审美和情感反应通常在长长的音乐通道的背景下发生，这些通道包含根据在它们之前的事件方面定义的结构。我们描述了听众脑对乐曲响应的电生理学研究，符合较长的音乐序列。音乐训练有素的LIS-Teners进行了一个Timbre变更检测任务，其中单音色调变化位于由350毫秒的色调组成的4Bar旋转内，以与旋律轮廓和瞬时的旋律和颞型差异（诱导时间间隙诱导）。 。对（任务相关）的事件相关的潜在响应引发了大约200毫秒的早期消极性（MMN / N2B）和大约350毫秒（P300）的后期正组分，反映了更新工作记忆中的TIMBRE变化。两种组件的放大曲线系统地改变了序列，与基于延期的上下文效应一致。此外，旋律轮廓改变将MMN / N2B响应（但不是P300）调制到稍后的序列位置的MICBRE变化。相比之下，任务 - 无关的时间间隙引发了未在上下文中不调制的MMN;不存在P300表明在工作存储器中未更新时间间隙复位。听众对音乐结构的神经响应系统地改变为连续的可预测性和听众的期望，在旋律语境中改变。

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