Action Experience, More than Observation, Influences Mu Rhythm Desynchronization
Action Experience, More than Observation, Influences Mu Rhythm Desynchronization
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DOI：
10.1371/journal.pone.0092002
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发表时间：
2014-03-24
期刊：
影响因子：
3.7
通讯作者：
Fox, Nathan A.
中科院分区：
文献类型：
--
作者：
Cannon, Erin N.;Yoo, Kathryn H.;Fox, Nathan A.
自从在猕猴的前运动区和顶叶区发现镜像神经元以来，行为和感知可能共享相同神经密码的想法一直是社会、发育和认知神经科学的核心兴趣。一个基本的问题是，一个假定的人类镜像神经元系统是如何调节到个体的运动经验的。本研究验证了先前运动经验调节感觉运动mu和beta节律的假设。具体来说，我们假设这些感觉运动节律在主动运动体验后比被动观察体验更加不同步。为了验证我们的假设，我们收集了成年参与者在观察一个相对新颖的动作时的脑电图：一个实验者用一个爪状的工具捡起一个玩具。在收集脑电图之前，我们训练一组成年人使用工具（表演者）执行此动作。第二组由训练有素的视频编码器组成，他们只有观察动作的经验（观察者）。表演者和观察者都没有先前的动作和视觉经验。第三组新手也接受了测试。与观察者和新手相比，表演者在8-13 Hz频段表现出最大的mu节奏不同步，特别是在右半球。这项研究首次对比了mu节律中的主动工具使用经验和观察经验，并显示了相对较短的经验量的调制，而不是之前的镜像神经元专业研究。这些发现就其作为早期社会学习机制的神经特征的更广泛含义进行了讨论。
Since the discovery of mirror neurons in premotor and parietal areas of the macaque monkey, the idea that action and perception may share the same neural code has been of central interest in social, developmental, and cognitive neurosciences. A fundamental question concerns how a putative human mirror neuron system may be tuned to the motor experiences of the individual. The current study tested the hypothesis that prior motor experience modulated the sensorimotor mu and beta rhythms. Specifically, we hypothesized that these sensorimotor rhythms would be more desynchronized after active motor experience compared to passive observation experience. To test our hypothesis, we collected EEG from adult participants during the observation of a relatively novel action: an experimenter used a claw-like tool to pick up a toy. Prior to EEG collection, we trained one group of adults to perform this action with the tool (performers). A second group comprised trained video coders, who only had experience observing the action (observers). Both the performers and the observers had no prior motor and visual experience with the action. A third group of novices was also tested. Performers exhibited the greatest mu rhythm desynchronization in the 8-13 Hz band, particularly in the right hemisphere compared to observers and novices. This study is the first to contrast active tool-use experience and observation experience in the mu rhythm and to show modulation with relatively shorter amounts of experience than prior mirror neuron expertise studies. These findings are discussed with respect to its broader implication as a neural signature for a mechanism of early social learning.