Creem S H, Downs T H, Wraga M, Harrington G S, Proffitt D R, Downs J H
University of Utah, Department of Psychology, 380 S. 1530 E. Rm. 502, Salt Lake City, UT 84112, USA.
Cogn Affect Behav Neurosci. 2001 Sep;1(3):239-49. doi: 10.3758/cabn.1.3.239.
In the present study, functional magnetic resonance imaging was used to examine the neural mechanisms involved in the imagined spatial transformation of one's body. The task required subjects to update the position of one of four external objects from memory after they had performed an imagined self-rotation to a new position. Activation in the rotation condition was compared with that in a control condition in which subjects located the positions of objects without imagining a change in self-position. The results indicated similar networks of activation to other egocentric transformation tasks involving decisions about body parts. The most significant area of activation was in the left posterior parietal cortex. Other regions of activation common among several of the subjects were secondary visual, premotor, and frontal lobe regions. These results are discussed relative to motor and visual imagery processes as well as to the distinctions between the present task and other imagined egocentric transformation tasks.
在本研究中，功能磁共振成像被用于检查参与身体想象空间转换的神经机制。该任务要求受试者在将自身想象旋转到新位置后，从记忆中更新四个外部物体之一的位置。将旋转条件下的激活情况与对照条件下的激活情况进行比较，在对照条件中，受试者定位物体位置时不想象自身位置的变化。结果表明，与其他涉及身体部位决策的以自我为中心的转换任务相比，激活网络相似。激活最显著的区域是左后顶叶皮层。几个受试者中共同激活的其他区域是次级视觉区、运动前区和额叶区域。将结合运动和视觉意象过程以及当前任务与其他想象的以自我为中心的转换任务之间的区别来讨论这些结果。
