The neural basis of the imitation drive.
The neural basis of the imitation drive.
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DOI：
10.1093/scan/nsv089
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发表时间：
2016-01
影响因子：
4.2
通讯作者：
Kawashima R
中科院分区：
文献类型：
--
作者：
Hanawa S;Sugiura M;Nozawa T;Kotozaki Y;Yomogida Y;Ihara M;Akimoto Y;Thyreau B;Izumi S;Kawashima R
自发模仿被认为是婴儿获得重要技能的基础，包括语言和社会交往。在这项研究中，功能磁共振成像（fMRI）被用来检查的神经基础的“自发”驱动的模仿，这还没有得到充分的研究。研究人员向健康的参与者展示了一些无意义的双手动作的电影片段，并指导他们在功能磁共振成像扫描过程中观察和模仿这些动作。随后，参与者再次观看电影片段，并被要求评估他们对每个动作的“模仿冲动”（冲动）的强度。我们寻找的皮质区的激活程度呈正相关的敦促分数;显着的正相关性，观察在右侧辅助运动区（SMA）和双侧中扣带回皮质（MCC）的模仿条件下。这些区域没有被解释为模仿的明确原因或动作的运动学特征。先前在猴子和人类中进行的研究表明SMA和MCC/尾侧扣带区参与了自愿行为。本研究还通过心理生理交互分析证实了冲动与模仿之间的功能联系。因此，我们的研究结果揭示了自发模仿的关键神经成分，并提供了婴儿自发模仿的可能原因。
Spontaneous imitation is assumed to underlie the acquisition of important skills by infants, including language and social interaction. In this study, functional magnetic resonance imaging (fMRI) was used to examine the neural basis of ‘spontaneously’ driven imitation, which has not yet been fully investigated. Healthy participants were presented with movie clips of meaningless bimanual actions and instructed to observe and imitate them during an fMRI scan. The participants were subsequently shown the movie clips again and asked to evaluate the strength of their ‘urge to imitate’ (Urge) for each action. We searched for cortical areas where the degree of activation positively correlated with Urge scores; significant positive correlations were observed in the right supplementary motor area (SMA) and bilateral midcingulate cortex (MCC) under the imitation condition. These areas were not explained by explicit reasons for imitation or the kinematic characteristics of the actions. Previous studies performed in monkeys and humans have implicated the SMA and MCC/caudal cingulate zone in voluntary actions. This study also confirmed the functional connectivity between Urge and imitation performance using a psychophysiological interaction analysis. Thus, our findings reveal the critical neural components that underlie spontaneous imitation and provide possible reasons why infants imitate spontaneously.