Synchronized drumming enhances activity in the caudate and facilitates prosocial commitment--if the rhythm comes easily.
Synchronized drumming enhances activity in the caudate and facilitates prosocial commitment--if the rhythm comes easily.
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DOI：
10.1371/journal.pone.0027272
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Keysers C
中科院分区：
文献类型：
--
作者：
Kokal I;Engel A;Kirschner S;Keysers C
为什么一起唱诗、打鼓或跳舞会让人感到团结？在这里，我们调查的神经机制背后的人际同步性及其随后的影响，在同步的个人之间的亲社会行为。我们假设，当个体在击鼓过程中经历同步时，大脑中与奖励处理相关的区域会活跃起来，这些奖励信号会增加对这个同步击鼓伙伴的亲社会行为。18名女性非音乐家在两个不同的实验者交替敲击节奏时进行了功能性磁共振成像扫描：一个与参与者同步，另一个与参与者不同步。在最后一个扫描部分，作为后续亲社会行为测试的实验操作，其中一名实验者与一半的参与者同步击鼓，另一半则不同步击鼓。在扫描之后，实验者“意外”掉了8支铅笔，参与者收集的铅笔数量被用来衡量亲社会承诺。结果显示，在扫描前容易掌握新节奏的参与者在同步击鼓时尾状核的活动增加。在定位任务中，相同的参与者也会对金钱奖励做出反应。在经历同步击鼓时尾状核的活动也预测了参与者后来收集的铅笔的数量，以帮助操纵的同步实验者运行。此外，在操作过程中，当实验者同步击鼓时，参与者收集了更多的铅笔来帮助她。通过显示同步击鼓和金钱奖励过程中激活区域的重叠，我们的研究结果表明，人际同步与大脑的奖励系统有关。
Why does chanting, drumming or dancing together make people feel united? Here we investigate the neural mechanisms underlying interpersonal synchrony and its subsequent effects on prosocial behavior among synchronized individuals. We hypothesized that areas of the brain associated with the processing of reward would be active when individuals experience synchrony during drumming, and that these reward signals would increase prosocial behavior toward this synchronous drum partner. 18 female non-musicians were scanned with functional magnetic resonance imaging while they drummed a rhythm, in alternating blocks, with two different experimenters: one drumming in-synchrony and the other out-of-synchrony relative to the participant. In the last scanning part, which served as the experimental manipulation for the following prosocial behavioral test, one of the experimenters drummed with one half of the participants in-synchrony and with the other out-of-synchrony. After scanning, this experimenter “accidentally” dropped eight pencils, and the number of pencils collected by the participants was used as a measure of prosocial commitment. Results revealed that participants who mastered the novel rhythm easily before scanning showed increased activity in the caudate during synchronous drumming. The same area also responded to monetary reward in a localizer task with the same participants. The activity in the caudate during experiencing synchronous drumming also predicted the number of pencils the participants later collected to help the synchronous experimenter of the manipulation run. In addition, participants collected more pencils to help the experimenter when she had drummed in-synchrony than out-of-synchrony during the manipulation run. By showing an overlap in activated areas during synchronized drumming and monetary reward, our findings suggest that interpersonal synchrony is related to the brain's reward system.
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影响因子：
2.5
作者：
Aschersleben, G
通讯作者：
Aschersleben, G
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作者：
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Montague, PR
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