Expansion of visual space after saccadic eye movements
Expansion of visual space after saccadic eye movements
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DOI：
10.1167/3.11.22
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发表时间：
2003-01-01
影响因子：
1.8
通讯作者：
Lee, C
中科院分区：
文献类型：
--
作者：
Cho, S;Lee, C
人类受试者报告了在没有视觉参考的情况下扫视后短暂呈现的视觉目标的感知二维位置。与以往的研究一致，水平扫视后，立即有一个显着的水平分量在错误定位的方向相反的扫视。然而，水平分量在定位误差是不恒定的，是更大的目标提出进一步进入视野逆扫视。对于相同的水平扫视，错误定位中的垂直分量也很明显，并且越远离扫视轨迹的目标，错误定位中的垂直分量越大。扫视效应导致了一种整体的定位错误模式，这种模式可以最好地描述为视觉空间的二维扩展。扩张原点与眼跳目标无关，而是从眼跳目标向眼跳方向移动。这些结果表明，空间信息处理的时间眼跳反映了地形之间的相互作用，从眼跳执行和视觉目标的神经激活。单点刺激沿沿着的错误定位位置的配置与Park，Lee & Lee（2001）描述的非真实运动感知模式不可比较，表明扫视后的空间错误定位和非真实运动感知是独立的现象。
Human subjects reported the perceived two-dimensional location of a visual target that was briefly presented after a saccade in the absence of visual references. Consistent with previous studies, immediately after horizontal saccades, there was a salient horizontal component in mislocalization in the direction opposite to the saccade. However, the horizontal component in mislocalization was not constant and was larger for targets presented further into the visual field contraversive to the saccade. For the same horizontal saccades, the vertical component in mislocalization was also obvious, and it was larger for targets located further away from the saccade trajectory. The saccadic effects resulted in an overall pattern of mislocalization that could be best described as a two-dimensional expansion of visual space. The point of expansive origin was not associated with the saccade goal, but was shifted from the saccade goal in the direction of the saccade. These results suggest that spatial information processing at the time of saccades reflects topographic interactions between neural activations from saccade execution and the visual target. The configuration of mislocalized positions of single point stimuli along a line was not comparable to the pattern of non-veridical motion perception described by Park, Lee & Lee (2001), indicating that spatial mislocalization and non-veridical motion perception after saccades are independent phenomena.