The selection of intended actions and the observation of others' actions: A time-resolved fMRI study
The selection of intended actions and the observation of others' actions: A time-resolved fMRI study
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DOI：
10.1016/j.neuroimage.2005.09.028
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发表时间：
2006-02-15
期刊：
影响因子：
5.7
通讯作者：
Moser, E
中科院分区：
文献类型：
--
作者：
Cunnington, R;Windischberger, C;Moser, E
每当我们计划、想象或观察一个动作时，参与准备和执行该动作的运动系统都会同样参与其中。然而，这种共同的运动激活形成的方式可能会有所不同，这取决于它是来自我们自己有意选择的行动，还是来自对他人行动的观察。在这项研究中，我们使用时间分辨事件相关的功能性MRI来梳理神经过程，特别是与观察到的动作的处理、我们自己预期动作的选择、运动准备和运动反应执行相关的神经过程。参与者观察到一个手指动作或提示他们应该选择自己的手指动作，然后是5秒的延迟时间；然后参与者执行观察到的或自己选择的动作。在准备和准备动作期间，在开始之前，我们发现高级运动区域的共同网络被激活，包括背侧和腹侧运动前区域和前辅助运动区域（前sma）；在运动执行过程中，更多的尾侧SMA显示出更大的激活。重要的是，这种共同运动激活的途径取决于参与者是自由选择要执行的动作，还是他们是否观察到另一个人执行的动作。动作的观察特别涉及到下顶叶和上顶叶区域的激活，反映了背视通路参与了计划动作所需的视运动加工。相比之下，动作选择特别涉及前额叶背外侧和前扣带皮层，反映了这些前额叶区域在注意选择和指导反应选择中的作用。(c) 2005爱思唯尔公司版权所有。
Whenever we plan, imagine, or observe an action, the motor systems that would be involved in preparing and executing that action are similarly engaged. The way in which such common motor activation is formed, however, is likely to differ depending on whether it arises from our own intentional selection of action or from the observation of another's action. In this study, we use time-resolved event-related functional MRI to tease apart neural processes specifically related to the processing of observed actions, the selection of our own intended actions, the preparation for movement, and motor response execution. Participants observed a finger gesture movement or a cue indicating they should select their own finger gesture to perform, followed by a 5-s delay period; participants then performed the observed or self-selected action. During the preparation and readiness for action, prior to initiation, we found activation in a common network of higher motor areas, including dorsal and ventral premotor areas and the pre-supplementary motor area (pre-SMA); the more caudal SMA showed greater activation during movement execution. Importantly, the route to this common motor activation differed depending on whether participants freely selected the actions to perform or whether they observed the actions performed by another person. Observation of action specifically involved activation of inferior and superior parietal regions, reflecting involvement of the dorsal visual pathway in visuomotor processing required for planning the action. In contrast, the selection of action specifically involved the dorsal lateral prefrontal and anterior cingulate cortex, reflecting the role of these prefrontal areas in attentional selection and guiding the selection of responses. (c) 2005 Elsevier Inc. All rights reserved.