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首页> 外文期刊>Neuropsychologia >What activates the human mirror neuron system during observation of artificial movements: bottom-up visual features or top-down intentions?
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What activates the human mirror neuron system during observation of artificial movements: bottom-up visual features or top-down intentions?

机译：是什么在观察人工运动时激活人镜像神经元系统的：自下而上的视觉特征或自上而下的意图？

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摘要

In a recent study we could show that during observation of artificial object movements a similar cortical network, including the areas of the so-called human mirror neuron system (hMNS), was activated as during the observation of hand movements. The present study investigated whether activation of the hMNS during the observation of artificial object movements depends more on the visual features of the movements (buttom-up), or, by manipulating the task instructions, on the intentional goal of an observer (top-down). Using a factorial design we recorded the hemodynamic responses in 20 healthy participants while they watched arbitrary artificial object movements following two types of movement trajectories (smooth vs. discontinuous). In one part of the experiment participants had to detect color changes of two objects (color task) and in another part they had to judge whether the movement pattern of two objects could be performed with human hands (simulation task). We found stronger activation in the hMNS during the simulation than during the color task for both types of movement trajectories. In contrast, the color task activated the left ventral-occipital area (human V4). A direct comparison of smooth vs. discontinuous movement trajectories revealed significant effects neither in the structures of the hMNS nor in human V4. The present findings suggest that it is not a specific visual feature, such as a smooth biological movement trajectory, that activates the hMNS. Rather, the hMNS seems to respond when an observed movement is matched to a motor representation triggered by the intentional goal of the observer.
机译：在最近的一项研究中，我们可以表明，在观察人造物体运动期间，与观察手部运动期间一样，激活了类似的皮层网络，包括所谓的人镜像神经元系统（hMNS）区域。本研究调查了在观察人造物体运动过程中hMNS的激活是否更多地取决于运动的视觉特征（向上运动），还是通过操纵任务指令，取决于观察者的有意目标（自上而下） ）。使用析因设计，我们记录了20名健康参与者的血液动力学响应，而他们观察了遵循两种运动轨迹（平滑与不连续）的任意人造物体的运动。在实验的一部分中，参与者必须检测两个对象的颜色变化（颜色任务），而在另一部分中，他们必须判断两个对象的运动模式是否可以用人的手执行（模拟任务）。我们发现，在两种模拟运动轨迹中，hMNS在模拟过程中的激活均比在彩色任务期间的激活强。相反，颜色任务激活了左腹枕区（人V4）。平滑运动轨迹和不连续运动轨迹的直接比较显示，无论是在hMNS的结构还是在人V4中，都没有显着影响。目前的发现表明，激活hMNS并不是特定的视觉特征，例如平滑的生物运动轨迹。相反，当观察到的运动与观察者的有意目标触发的运动表现相匹配时，hMNS似乎会做出响应。

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