Institute for Experimental Psychology, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany.
Institute for Experimental Psychology, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany.
Curr Biol. 2021 Mar 8;31(5):1029-1036.e2. doi: 10.1016/j.cub.2020.11.032. Epub 2020 Dec 18.
How do we estimate the position of an object in the world around us? Naturally, we would direct our gaze to that object. Accordingly, neural motor coordinates entail the distance of external objects and thus might be used to derive perceptual estimates. Several general frameworks in the history of perceptual science have offered such a view. However, a mechanism showing how motor and visual processes communicate remains elusive. Here, we report that every post-saccadic error biases visual localization in a serially dependent manner. In order to simulate a realignment of visual space through motor coordinates, we induced an artificial de-alignment between visual and motor space. We found that when performing saccades under this distortion, post-saccadic error information clearly realigned visual and motor space, again in a serially dependent manner. These results demonstrate that the consequences of every saccade directly influence where we see objects in the world. On a neural basis, this requires that motor signals, which generate close to the saccade production machinery, are reported to cortical areas and arrange visual space. This view is consistent with recent electrophysiological findings of post-saccadic error processing in posterior parietal cortex..
我们如何估计我们周围世界中物体的位置？自然，我们会将目光投向该物体。因此，神经运动坐标包含外部物体的距离，因此可以用于得出感知估计。感知科学史上的几个一般框架提供了这样的观点。然而，显示运动和视觉过程如何进行通信的机制仍然难以捉摸。在这里，我们报告说，每个眼跳后的误差都会以串行依赖的方式使视觉定位产生偏差。为了通过运动坐标模拟视觉空间的重新对准，我们在视觉和运动空间之间引入了人为的失准。我们发现，在这种失真下进行眼跳时，眼跳后的误差信息会明显地以串行依赖的方式重新对准视觉和运动空间。这些结果表明，每次眼跳的后果都会直接影响我们在世界上看到物体的位置。从神经基础上讲，这需要在接近眼跳产生机制的地方报告运动信号，以便安排视觉空间。这种观点与最近在后顶叶皮层中发现的眼跳后误差处理的电生理学发现一致。
