Common and Specific Neural Correlates Underlying the Spatial Congruency Effect Induced by the Egocentric and Allocentric Reference Frame
Common and Specific Neural Correlates Underlying the Spatial Congruency Effect Induced by the Egocentric and Allocentric Reference Frame
复制标题
自我中心和异中心参考系引起的空间一致性效应背后的共同和特定神经关联
DOI：
10.1002/hbm.23508
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发表时间：
2017-04-01
影响因子：
4.8
通讯作者：
Chen, Qi
中科院分区：
文献类型：
--
作者：
Liu, Nan;Li, Hui;Chen, Qi
一个物体的空间位置可以用两种参照系来表示：自我中心（相对于观察者的身体或身体部位）和非自我中心（相对于另一个独立于观察者的物体）。相对于两个帧的对象位置可以是全等的（例如，左或右）或不一致（e.例如，在一个实施例中，一个左，一个右）。然而，大多数以前的研究，并没有区分这两种类型的空间冲突。为了探讨两个参考框架引起的空间一致性效应的共同和具体的神经机制，我们采用了3（任务类型：allocentric，自我中心，和颜色）3 2（空间一致性：一致与不一致）在本fMRI研究的受试者内设计。在自我中心任务中，与任务无关的自我中心表征诱发了空间一致性效应，而在自我中心任务中，与任务无关的自我中心表征诱发了空间一致性效应。采用非空间颜色任务控制一致和不一致条件下自下而上刺激的差异。在行为上，空间一致性效应在自我中心和他者中心任务中都显著存在。在神经元方面，背内侧视顶流通常参与任务无关的自我中心和他中心表征所引起的空间一致性效应。右上级顶叶皮层和右中央前回分别特异性地参与了无关的自我中心和非自我中心表征诱发的空间一致性效应。综上所述，这些结果表明，不同的分区在顶额网络发挥不同的功能作用的空间相互作用之间的自我中心和allocentric参考框架。(C)2017年Wiley Periodicals，Inc.
The spatial location of an object can be represented in two frames of reference: egocentric (relative to the observer's body or body parts) and allocentric (relative to another object independent of the observer). The object positions relative to the two frames can be either congruent (e.g., both left or both right) or incongruent (e. g., one left and one right). Most of the previous studies, however, did not discriminate between the two types of spatial conflicts. To investigate the common and specific neural mechanisms underlying the spatial congruency effect induced by the two reference frames, we adopted a 3 (type of task: allocentric, egocentric, and color) 3 2 (spatial congruency: congruent vs. incongruent) within-subject design in this fMRI study. The spatial congruency effect in the allocentric task was induced by the task- irrelevant egocentric representations, and vice versa in the egocentric task. The non spatial color task was introduced to control for the differences in bottom-up stimuli between the congruent and incongruent conditions. Behaviorally, significant spatial congruency effect was revealed in both the egocentric and allocentric task. Neurally, the dorsal-medial visuoparietal stream was commonly involved in the spatial congruency effect induced by the task- irrelevant egocentric and allocentric representations. The right superior parietal cortex and the right precentral gyrus were specifically involved in the spatial congruency effect induced by the irrelevant egocentric and allocentric representations, respectively. Taken together, these results suggested that different subregions in the parieto-frontal network played different functional roles in the spatial interaction between the egocentric and allocentric reference frame. (C) 2017 Wiley Periodicals, Inc.