Motor familiarity: Brain activation when watching kinematic displays of one's own movements
Motor familiarity: Brain activation when watching kinematic displays of one's own movements
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DOI：
10.1016/j.neuropsychologia.2012.05.009
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发表时间：
2012-07-01
期刊：
影响因子：
2.6
通讯作者：
Munzert, Joern
中科院分区：
文献类型：
--
作者：
Bischoff, Matthias;Zentgraf, Karen;Munzert, Joern
对动作的感知受观察者对动作的熟悉程度的影响。然而，运动对自身运动模式的熟悉如何调节动作效果的视觉感知？当20名观察者观看录像显示对方乒乓球运动员肩膀、右肘和手腕上的标志物时，大脑皮质的激活被用功能磁共振检查。球拍和球没有展示。参与者被要求预测击球的无形影响，也就是球的飞行方向。不同的乒乓球模型被使用，观察者事先不知道并被告知所展示的一些视频显示了他们在早期训练中的动作。必须做出预测，而不考虑由四个移动标记所代表的球员的身份。结果显示，参与者在观察自己的笔划时表现得更好。使用感兴趣区方法，fMRI数据显示，观察自己的视频伴随着(与其他视频相比)更强的顶下叶左侧角回和前吻内侧额叶皮质的激活。在左侧顶内沟和右侧边缘上回，其他视频比自己的视频诱发了更强的激活。我们认为，在对常见动作的动作观察中，观察到的动作和观察者的运动表征之间的兼容性已经编码在顶角回中--除了副扣带回。角度健身房的激活可能是伴随着演员特定的前额叶加工的动作特定效应提取的一部分。顶内沟似乎对观察到的运动学和内部模型表征之间的不一致很敏感，这也影响了边缘上回的加工。(C)2012爱思唯尔有限公司。保留所有权利。
The perception of action is influenced by the observer's familiarity with its movement. However, how does motor familiarity with own movement patterns modulate the visual perception of action effects? Cortical activation was examined with fMRI while 20 observers were watching videotaped point-light displays of markers on the shoulders, the right elbow, and wrist of an opposing table tennis player. The racket and ball were not displayed. Participants were asked to predict the invisible effect of the stroke, that is, the ball flight direction. Different table tennis models were used without the observers knowing and being informed in advance that some of the presented videos displayed their own movements from earlier training sessions. Prediction had to be made irrespective of the identity of the player represented by the four moving markers. Results showed that participants performed better when observing their "own" strokes. Using a region-of-interest approach, fMRI data showed that observing own videos was accompanied by stronger activation (compared to other videos) in the left angular gyrus of the inferior parietal lobe and the anterior rostral medial frontal cortex. Other videos elicited stronger activation than own videos in the left intraparietal sulcus and right supramarginal gyms. We suggest that during action observation of motorically familiar movements, the compatibility between the observed action and the observers' motor representation is already coded in the parietal angular gyrus-in addition to the paracingulate gyrus. The activation in angular gyms is presumably part of an action-specific effect retrieval that accompanies actor-specific prefrontal processing. The intraparietal sulcus seems to be sensitive to incongruence between observed kinematics and internal model representations, and this also influences processing in the supramarginal gyms. (C) 2012 Elsevier Ltd. All rights reserved.