Modulating the experience of agency: a positron emission tomography study
Modulating the experience of agency: a positron emission tomography study
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DOI：
10.1016/s1053-8119(02)00041-1
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发表时间：
2003-02-01
期刊：
影响因子：
5.7
通讯作者：
Jeannerod, A
中科院分区：
文献类型：
--
作者：
Farrer, C;Franck, N;Jeannerod, A
这项研究调查了能动性，即被因果地卷入一个行动的感觉。正是这种感觉导致我们将一个行为归因于自己，而不是他人。我们感兴趣的是，通过实验调节这种体验对已知参与动作识别和自我识别的大脑区域的影响。我们使用了一种设备，允许我们修改受试者对屏幕上呈现的虚拟手的运动的控制程度。使用了四个主要条件：（1）受试者完全控制虚拟手的动作的状态，（2）虚拟手的动作相对于受试者所做的动作看起来旋转了25度的状态，（3）虚拟手的动作看起来旋转了50度的状态，以及（4）虚拟手的运动由另一个人产生并且不对应于对象的运动的情况。两个主要大脑区域的活动似乎受到执行的动作和屏幕上看到的动作之间差异程度的调节。在顶叶的下部，特别是右侧，受试者对虚拟手的运动控制越少，激活水平就越高。相反的协变，观察到的ESTA。这些结果表明，特定大脑区域的活动水平映射到引起或控制动作的体验上。这些结果的含义为理解病理条件进行了讨论。(C)2003 Elsevier Science（美国）。All rights reserved.
This study investigated agency, the feeling of being causally involved in an action. This is the feeling that leads us to attribute an action to ourselves rather than to another person. We were interested in the effects of experimentally modulating this experience on brain areas known to be involved in action recognition and self-recognition. We used a device that allowed us to modify the subject's degree of control of the movements of a virtual hand presented on a screen. Four main conditions were used: (1) a condition where the subject had a full control of the movements of the virtual hand, (2) a condition where the movements of the virtual hand appeared rotated by 25degrees with respect to the movements made by the subject, (3) a condition where the movements of the virtual hand appeared rotated by 50degrees, and (4) a condition where the movements of the virtual hand were produced by another person and did not correspond to the subject's movements. The activity of two main brain areas appeared to be modulated by the degree of discrepancy between the movement executed and the movement seen on the screen. In the inferior part of the parietal lobe, specifically on the right side, the less the subject felt in control of the movements of the virtual hand, the higher the level of activation. A reverse covariation was observed in the insula. These results demonstrate that the level of activity of specific brain areas maps onto the experience of causing or controlling an action. The implication of these results for understanding pathological conditions is discussed. (C) 2003 Elsevier Science (USA). All rights reserved.