Feeling the beat: premotor and striatal interactions in musicians and nonmusicians during beat perception.
Feeling the beat: premotor and striatal interactions in musicians and nonmusicians during beat perception.
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DOI：
10.1523/jneurosci.2018-08.2009
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发表时间：
2009-06-10
期刊：
影响因子：
--
通讯作者：
Rowe JB
中科院分区：
文献类型：
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作者：
Grahn JA;Rowe JB
尽管节奏和节拍感知具有普遍的文化重要性，但人们对其潜在的神经生物学知之甚少。在这里，我们使用功能性磁共振成像来研究音乐家和非音乐家的节奏感知。三种情况在需要外部强化与内部产生热量的程度上有所不同。“音量”条件通过音量变化强烈地在外部标记节拍，“持续时间”条件通过持续时间变化产生的较弱重音标记节拍，而“无重音”条件要求节拍完全由内部生成。在所有条件下，有节奏的节奏与无节奏的控制节奏相比，显示了壳核的活动。心跳的存在还与壳核与辅助运动区（SMA）、运动前皮层（PMC）和听觉皮层之间更强的连通性有关。相比之下，节拍条件下的重音类型调节了前运动皮层和听觉皮层之间的耦合，音乐家比非音乐家调节得更大。重要的是，壳核对节拍条件的反应不是由于三种节奏条件之间时间复杂性的差异。我们提出一个皮质-皮质下网络，包括壳核、SMA和PMC，用于分析时间序列和预测或产生假定的心跳，特别是在可能需要内部产生心跳的条件下。这个系统对听觉-运动互动和精确定时运动的发展的重要性在这里被音乐家的促进所暗示。
Little is known about the underlying neurobiology of rhythm and beat perception, despite its universal cultural importance. Here we used functional magnetic resonance imaging to study rhythm perception in musicians and non-musicians. Three conditions varied in the degree to which external reinforcement versus internal generation of the beat was required. The ‘Volume’ condition strongly externally marked the beat with volume changes, the ‘Duration’ condition marked the beat with weaker accents arising from duration changes, and the ‘Unaccented’ condition required the beat to be entirely internally generated. In all conditions, beat rhythms compared to nonbeat control rhythms revealed putamen activity. The presence of a beat was also associated with greater connectivity between the putamen and the supplementary motor area (SMA), the premotor cortex (PMC) and auditory cortex. In contrast, the type of accent within the beat conditions modulated the coupling between premotor and auditory cortex, with greater modulation for musicians than non-musicians. Importantly, the putamen's response to beat conditions was not due to differences in temporal complexity between the three rhythm conditions. We propose that a cortico-subcortical network including the putamen, SMA, and PMC is engaged for the analysis of temporal sequences and prediction or generation of putative beats, especially under conditions that may require internal generation of the beat. The importance of this system for auditory-motor interaction and development of precisely timed movement is suggested here by its facilitation in musicians.