The role of presaccadic compression of visual space in spatial remapping across saccadic eye movements
The role of presaccadic compression of visual space in spatial remapping across saccadic eye movements
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DOI：
10.1016/s0042-6989(03)00301-8
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发表时间：
2003-08-01
期刊：
影响因子：
1.8
通讯作者：
Uchikawa, K
中科院分区：
文献类型：
--
作者：
Matsumiya, K;Uchikawa, K
当多个条就在扫视之前在视觉参考上在扫视目标附近短暂闪烁时，多个条的总宽度看起来朝向扫视目标压缩。我们发现，前视压缩的视觉空间有关的位移的视觉刺激的位移后出现的眼跳的另一个刺激的属性。受试者观察一个酒吧和一把尺子。在扫视过程中，杆被移位，并且标尺同时短暂地消失，然后标尺在扫视后重新出现在相同的位置。受试者的印象是，在扫视后，杆似乎保持静止，标尺似乎移位。当视觉空间的压缩量在扫视开始时达到最大值时，这种印象强烈地发生。此外，它只发生在扫视目标以同样的方式作为视觉空间的前扫视压缩。在扫视目标和与扫视目标相对的位置处，位移的扫视抑制是等同的，这表明在扫视之后出现的标尺的位移对条位移的归因不是位移的扫视抑制的结果。此外，执行方向辨别任务表明，酒吧出现固定在扫视目标在视觉空间的压缩过程中，即使酒吧实际上是位移。我们解释这些结果表明，precaccadic压缩的视觉空间建立的位置的扫视目标（酒吧）作为参考，然后的位置的统治者是retrapped相对于参考位置后扫视，导致在虚幻的位移的统治者。(C)2003爱思唯尔科技有限公司版权所有。
When multiple bars are briefly flashed near the saccadic goal on a visual reference just before a saccade, the total width of the multiple bars appears to be compressed toward the saccadic goal. We show that presaccadic compression of visual space is related to the attribution of the displacement of a visual stimulus to the displacement of another stimulus appearing after the saccade. Subjects observed a bar and a ruler. The bar was displaced during a saccade and the ruler disappeared briefly at the same time, and then the ruler reappeared at the same location after the saccade. The subjects had the impression that the bar appeared to remain stationary and the ruler appeared to be displaced after the saccade. This impression occurs strongly when the amount of the compression of visual space reaches the maximum at the saccade onset. Also, it occurs only at the saccadic goal in the same way as presaccadic compression of visual space. Saccadic suppression of displacement was equivalent at the saccadic goal and in the location opposite to the saccadic goal, indicating that the attribution of the bar displacement to the displacement of the ruler appearing after the saccade is not a consequence of saccadic suppression of displacement. Furthermore, performing a direction discrimination task showed that the bar appears stationary at the saccadic goal during compression of visual space even when the bar was actually displaced. We interpret these results as showing that presaccadic compression of visual space establishes the location of the saccadic goal (the bar) as a reference and then the location of the ruler is retrapped relative to the reference location after the saccade, resulting in the illusory displacement of the ruler. (C) 2003 Elsevier Science Ltd. All rights reserved.