Listening to Musical Rhythms Recruits Motor Regions of the Brain
Listening to Musical Rhythms Recruits Motor Regions of the Brain
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DOI：
10.1093/cercor/bhn042
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发表时间：
2008-12-01
期刊：
影响因子：
3.7
通讯作者：
Zatorre, Robert J.
中科院分区：
文献类型：
--
作者：
Chen, Joyce L.;Penhune, Virginia B.;Zatorre, Robert J.
知觉和动作可以紧密结合，但知觉事件与动作过程分离后，运动系统是否仍然参与其中？我们进行了2项功能性磁共振成像研究，涉及节律感知和产生，以解决这个问题。在实验1中，在每个试验中，受试者首先听到预期的敲击，然后随着音乐节奏沿着敲击。补充运动区，中运动前皮质（PMC），小脑的招聘过程中观察到听与预期。为了测试这种激活是否与运动计划或排练有关，在实验2中，受试者天真地听节奏，而不知道他们稍后会跟着节奏沿着敲击。然而，尽管没有动作-感知联系，相同的运动区域也参与其中。相比之下，腹侧PMC仅在动作和动作耦合感知过程中招募，而背侧部分仅对基于时间组织的高阶规则的动作选择敏感。这些功能分离揭示了动作知觉过程的本质，并表明在节奏的背景下听觉和运动系统之间存在内在联系。
Perception and actions can be tightly coupled; but does a perceptual event dissociated from action processes still engage the motor system? We conducted 2 functional magnetic resonance imaging studies involving rhythm perception and production to address this question. In experiment 1, on each trial subjects 1st listened in anticipation of tapping, and then tapped along with musical rhythms. Recruitment of the supplementary motor area, mid-premotor cortex (PMC), and cerebellum was observed during listen with anticipation. To test whether this activation was related to motor planning or rehearsal, in experiment 2 subjects naively listened to rhythms without foreknowledge that they would later tap along with them. Yet, the same motor regions were engaged despite no action-perception connection. In contrast, the ventral PMC was only recruited during action and action-coupled perceptual processes, whereas the dorsal part was only sensitive to the selection of actions based on higher-order rules of temporal organization. These functional dissociations shed light on the nature of action-perception processes and suggest an inherent link between auditory and motor systems in the context of rhythm.