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首页> 外文期刊>The European Journal of Neuroscience >Bilateral motor resonance evoked by observation of a one-hand movement: role of the primary motor cortex.
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Bilateral motor resonance evoked by observation of a one-hand movement: role of the primary motor cortex.

机译：单手运动引起的双边运动共振：初级运动皮层的作用。

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In humans, observation of movement performed by others evokes a subliminal motor resonant response, probably mediated by the mirror neurone system, which reproduces the motor commands needed to execute the observed movement with good spatial and temporal fidelity. Motor properties of the resonant response were here investigated with the ultimate goal of understanding the principles operating in the transformation from observation to internal reproduction of movement. Motor resonance was measured as the modulation of excitability of spinal motoneurones, evoked by the observation of a cyclic flexion-extension of one hand. The first two experiments showed that the observation of a one-hand movement always evoked a bimanual resonant response independent of which hand was observed and that these bilateral responses were consistently phase-linked. H-reflexes simultaneously recorded in right and left flexor carpi radialis muscles were always modulated 'in-phase' with each other. The goal of the third experiment was to define the role of primary motor cortex in the bilateral resonant response. Bilateral H-reflexes were recorded during a temporary inactivation induced by transcranial magnetic stimulation over the left cortical hand motor area of observers. The finding that such cortical depression abolished the H-reflex modulation of only the right flexor carpi radialis motoneurones, leaving it unchanged on the left side, suggested that both primary motor areas were activated by the premotor cortex and transmit the resonant activation through crossed corticospinal pathways. The data provide further evidence that the subliminal activation of motor pathways induced by movement observation is organized according to general rules shared with the control of voluntary movement.
机译：在人类中，对他人执行的运动的观察会引起下意识运动共振反应，可能是由镜像神经元系统介导的，该运动以良好的时空保真度再现了执行观察到的运动所需的运动命令。在此，研究了共振响应的电机特性，其最终目的是理解从观察到运动内部再现的转换过程中的工作原理。通过观察一只手的循环屈伸性，将运动共振测量为脊髓运动神经元的兴奋性调节。前两个实验表明，对单手运动的观察始终会引起双向共振响应，而与观察到的那只手无关，并且这些双侧响应始终是相位相关的。同时记录在左右侧radial腕腕radial肌中的H反射总是相互“同相”调制。第三个实验的目的是定义初级运动皮层在双侧共振反应中的作用。在观察者的左皮质运动区域，经颅磁刺激引起的暂时性失活期间，记录了双侧H反射。这种皮质凹陷的发现仅消除了右radial屈腕神经运动神经元的H反射调制，而在左侧则保持不变，这表明两个主要运动区域均由运动前皮层激活，并通过交叉的皮质脊髓途径传递共振激活。 。数据提供了进一步的证据，表明运动观察引起的运动通路的潜意识激活是根据与自愿运动控制共享的一般规则组织的。

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