Holmes Nicholas P, Crozier Gemma, Spence Charles
Department of Experimental Psychology, University of Oxford, Oxford, England.
Cogn Affect Behav Neurosci. 2004 Jun;4(2):193-200. doi: 10.3758/cabn.4.2.193.
If we stand at a mirror's edge, we can see one half of our body reflected in the mirror, as if it were the other half of our body, seen "through" the mirror. We used this mirror illusion to examine the effect of conflicts between visually and proprioceptively specified arm positions on subsequent reaching movements made with the unseen right arm. When participants viewed their static left arm in the mirror (i.e., as if it were their right arm), subsequent right-arm reaching movements were affected significantly more when there was conflict between the apparent visual and the proprioceptively specified right-arm positions than when there was no conflict. This result demonstrates that visual capture of arm position can occur when individual body parts are viewed in the mirror and that this capture has a measurable effect on subsequent reaching movements made with an unseen arm. The result has implications for how the brain represents the body across different sensory modalities.
如果我们站在镜子边缘，能看到自己身体的一半映在镜子里，就好像它是我们身体的另一半，是“透过”镜子看到的。我们利用这种镜像错觉来研究视觉和本体感觉所确定的手臂位置之间的冲突对随后用未看见的右臂进行的伸展动作的影响。当参与者在镜子中看到自己静止的左臂时（即好像它是自己的右臂），与不存在冲突时相比，当明显的视觉信息和本体感觉所确定的右臂位置之间存在冲突时，随后的右臂伸展动作受到的影响要大得多。这一结果表明，当在镜子中观察身体的各个部位时，手臂位置的视觉捕捉是可能发生的，并且这种捕捉对随后用未看见的手臂进行的伸展动作有可测量的影响。该结果对于大脑如何在不同的感觉模态中表征身体具有启示意义。
