Visuomotor Effects of Body Part Movements Presented in the First-Person Perspective on Imitative Behavior
Visuomotor Effects of Body Part Movements Presented in the First-Person Perspective on Imitative Behavior
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DOI：
10.1002/hbm.23823
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发表时间：
2017-12-01
影响因子：
4.8
通讯作者：
Taira, Masato
中科院分区：
文献类型：
--
作者：
Watanabe, Rui;Higuchi, Takahiro;Taira, Masato
由于镜像神经元系统（MNS）对第一人称视角（FPP）刺激的反应相对较大，因此从第一人称视角（FPP）呈现的模仿刺激比从第三人称视角（TPP）呈现的模仿刺激产生更强的视觉效果。一些先前的研究利用TPP刺激报道了运动和静止身体的刺激之间的MNS活动没有差异。然而，很少有研究比较视觉效果的刺激时，在FPP。为了澄清这个问题，我们测量了17名参与者在功能性磁共振成像（MRI）模仿任务中的皮层激活，该任务涉及三种条件：移动（举起手指），静态（静态手指上出现“X”）和控制（按钮上出现“X”）。所有刺激均来自FPP或TPP。参与者被要求举起与模仿刺激相对应的手指。在FPP条件下，运动刺激比静态刺激引起更大的MNS激活。此外，这样的运动效果更强的MNS和MNS（与身体所有权相关的区域）的FPP刺激比TPP刺激。心理生理学的相互作用分析显示，在FPP条件下，移动刺激的MNS和MNS之间的连接增加。这些研究结果表明，在FPP中呈现的身体运动比在FPP中呈现的静态身体引起更大的视觉反应，并且身体运动的视觉效果在FPP条件下比在TPP条件下更大。我们的分析进一步表明，这种反应是通过身体所有权背后的神经系统处理的。(c)2017 Wiley Periodicals，Inc.
Imitative stimuli presented from a first-person perspective (FPP) produce stronger visuomotor effects than those presented from a third-person perspective (TPP) due to the relatively greater response of the mirror neuron system (MNS) to FPP stimuli. Some previous studies utilizing TPP stimuli have reported no differences in MNS activity between moving and static bodies' stimuli. However, few studies have compared visuomotor effects of such stimuli when presented in the FPP. To clarify this issue, we measured cortical activation in 17 participants during a functional magnetic resonance imaging (MRI) imitation task involving three conditions: moving (a lifting finger was presented), static (an "X" appeared on a static finger), and control (an "X" appeared on a button). All stimuli were presented from the FPP or TPP. Participants were asked to lift the finger corresponding to the imitative stimulus. In the FPP condition, moving stimuli elicited greater MNS activation than static stimuli. Furthermore, such movement effects were stronger in the MNS and insula (a region associated with body-ownership) for FPP stimuli than for TPP stimuli. Psychophysiological interaction analysis revealed increased connectivity between the MNS and insula for moving stimuli in the FPP condition. These findings suggest that bodily movements presented in the FPP elicit a greater visuomotor response than static body presented in the FPP, and that the visuomotor effects of bodily movements were greater in the FPP condition than in the TPP condition. Our analyses further indicated that such responses are processed via the neural system underlying body-ownership. (c) 2017 Wiley Periodicals, Inc.