Liu Qiang, Wu Ying, Yang Qun, Campos Jennifer L, Zhang Qinglin, Sun Hong-Jin
Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing, China.
Neuroreport. 2009 May 27;20(8):809-14. doi: 10.1097/WNR.0b013e32832be7c0.
The aim of this study was to investigate the neural correlates of size illusions. Participants were presented with a sphere of a fixed angular size positioned (i) at either a far or close position within a three-dimensional virtual scene or (ii) at either an upper or lower screen position on a plain gray background. The visual-evoked potentials were recorded while participants were required to fixate on and attend to the sphere. The results showed that the amplitude of visual P2 component was affected by sphere position in the three-dimensional scene condition only, suggesting that the activity level of the primary visual cortex was modulated by the size illusion at later stages of visual processing.
本研究的目的是调查大小错觉的神经关联。向参与者呈现一个固定视角大小的球体，该球体位于（i）三维虚拟场景中的远处或近处位置，或者（ii）在纯灰色背景上的屏幕上部或下部位置。在要求参与者注视并关注球体的同时记录视觉诱发电位。结果表明，视觉P2成分的振幅仅在三维场景条件下受球体位置的影响，这表明初级视觉皮层的活动水平在视觉处理的后期阶段受到大小错觉的调节。
