Department of Psychology, Institute of Psychology, Chinese Academy of Sciences, Nanjing University, Nanjing 210093, PR China.
Brain Res. 2010 Dec 2;1363:107-16. doi: 10.1016/j.brainres.2010.09.068. Epub 2010 Sep 25.
Using functional magnetic resonance imaging (fMRI), the present study examined the neural mechanisms involved in recognizing spatial configurations of a scene from multiple viewpoints. Prior to scanning, participants were instructed to learn a desktop array of seven objects relative to an intrinsic direction that was different from the participants' viewpoint. During scanning, participants recognized triplets of objects from the previously memorized scene and from a mirror reflection of the scene at different perspectives. Half of the triplets included two objects located along the instructed intrinsic direction (intrinsic triplets) and the other half did not (non-intrinsic triplets). Consistent with previous mental rotation studies, bilateral intraparietal sulcus and bilateral middle frontal gyrus showed increasing activation with the angular disparity between the test view and the study view. The right intraparietal sulcus was more activated to the non-intrinsic triplets than the intrinsic triplets. The anterior cingulate cortex was more deactivated in recognizing non-intrinsic triplets and novel views. These findings are consistent with the behavioral results that recognition was easier for intrinsic triplets than for non-intrinsic triplets and easier for the familiar view than for novel views (Mou et al., 2008a).
本研究使用功能磁共振成像（fMRI）技术，考察了从多个视角识别场景空间结构所涉及的神经机制。在扫描前，参与者被要求学习一个桌面排列的七个物体，相对于一个与参与者视角不同的固有方向。在扫描过程中，参与者识别出先前记忆场景和不同视角下场景的镜像反射中的三个物体。三分之一的物体包含两个沿指令固有方向（固有三胞胎）放置的物体，另一半则没有（非固有三胞胎）。与之前的心理旋转研究一致，双侧顶内沟和双侧额中回随着测试视图和研究视图之间的角度差异而呈现出越来越强的激活。与固有三胞胎相比，右顶内沟对非固有三胞胎的激活更强。在识别非固有三胞胎和新视图时，前扣带皮层的激活程度更低。这些发现与行为结果一致，即识别固有三胞胎比识别非固有三胞胎更容易，识别熟悉视图比识别新视图更容易（Mou 等人，2008a）。
