Keehner Madeleine, Guerin Scott A, Miller Michael B, Turk David J, Hegarty Mary
School of Psychology, Curtin University of Technology, GPO Box U 1987, Perth 6845, Western Australia, Australia.
Neuroimage. 2006 Oct 15;33(1):391-8. doi: 10.1016/j.neuroimage.2006.06.043. Epub 2006 Aug 24.
Imagined spatial transformations of objects (e.g., mental rotation) and the self (e.g., perspective taking) are psychologically dissociable. In mental rotation, the viewer transforms the location or orientation of an object relative to stable egocentric and environmental reference frames. In imagined shifts of perspective, the viewer's egocentric reference frame is transformed with respect to stable objects and environment. Using fMRI, we showed that during mental transformations of objects the right superior parietal cortex exhibited a positive linear relationship between hemodynamic response and degrees of rotation. By contrast, during imagined transformations of the self, the same regions exhibited a negative linear trend. We interpret this finding in terms of the role of parietal cortex in coding the locations of objects in relation to the body.
物体（如心理旋转）和自我（如采择视角）的想象空间变换在心理层面是可分离的。在心理旋转中，观察者相对于稳定的自我中心和环境参照系变换物体的位置或方向。在想象的视角转换中，观察者的自我中心参照系相对于稳定的物体和环境发生变换。通过功能磁共振成像，我们发现，在物体的心理变换过程中，右侧顶上叶皮质的血液动力学反应与旋转度数之间呈现正线性关系。相比之下，在自我的想象变换过程中，相同区域呈现负线性趋势。我们根据顶叶皮质在编码物体相对于身体的位置方面的作用来解释这一发现。
