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Embodied simulation and ambiguous stimuli: The role of the mirror neuron system

机译：体现模拟和模棱两可的刺激：镜像神经元系统的作用

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According to the "embodied simulation theory," exposure to certain visual stimuli would automatically trigger action simulation in the mind of the observer, thereby originating a "feeling of movement" modulated by the mirror neuron system (MNS). Grounded on this conceptualization, some of us recently suggested that when exposed to the Rorschach inkblots, in order to see a human movement (e.g., "a person running") in those ambiguous stimuli, the observer would need to experience a "feeling of movement" via embodied simulation. The current study used repetitive transcranial magnetic stimulation (rTMS) to further test this hypothesis. Specifically, we investigated whether temporarily interfering with the activity of the left inferior frontal gyrus (LIFG; a putative MNS area) using rTMS would decrease the propensity to see human movement (M) in the Rorschach inkblots. Thirty-six participants were exposed to the Rorschach stimuli twice, i.e., during a baseline (without rTMS) and soon after inhibitory rTMS. As for the rTMS condition, half of the sample was stimulated over the LIFG (experimental group) and the other half over the Vertex (control group). In line with our hypothesis, the application of rTMS over LIFG, but not over Vertex, yielded a statistically significant reduction in the attribution of M to the ambiguous stimuli, with large effect size. These findings may be interpreted as being consistent with the hypothesis that there is a link between the MNS and the "feeling of movement" people may experience, when observing ambiguous stimuli such as the Rorschach cards. (C) 2015 Elsevier B.V. All rights reserved.
机译：根据“具体模拟理论”，暴露于某些视觉刺激会自动触发观察者脑海中的动作模拟，从而产生由镜像神经元系统（MNS）调制的“运动感觉”。基于这种概念化，我们中的一些人最近建议，当暴露于罗夏墨迹时，为了看到人类运动（例如“奔跑的人”）在这些模棱两可的刺激下，观察者将需要体验“运动的感觉”。通过具体化的模拟。当前的研究使用重复经颅磁刺激（rTMS）进一步检验了这一假设。具体来说，我们调查了使用rTMS暂时干扰左下额叶回（LIFG;假定的MNS区域）的活动是否会降低在Rorschach墨迹中看到人类运动（M）的倾向。三十六名参与者两次暴露于Rorschach刺激下，即在基线期间（无rTMS）和抑制性rTMS之后不久。至于rTMS条件，一半的样品在LIFG（实验组）上刺激，另一半在顶点（对照组）上刺激。符合我们的假设，rTMS在LIFG上而不是在Vertex上的应用在统计学上显着降低了M对歧义刺激的归因，且影响大小较大。这些发现可能被解释为与MNS和人们在观察诸如Rorschach卡之类的含糊刺激时可能经历的“运动感觉”之间存在联系的假设相一致。 （C）2015 Elsevier B.V.保留所有权利。

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