Rapid visual stability for action

我们每秒钟进行3-5次快速的眼球运动，称为扫视，以检查我们周围的世界。扫视是必要的，以使中央凹，视网膜的一部分，具有最高的敏锐度，不同地区的视觉场景。然而，这种探索方式带来了巨大的挑战，因为每次我们移动眼睛时，视网膜上的物体位置都会发生变化。然而，通常情况下，我们不会在扫视过程中体验到物体的位置变化，世界被视为一个连贯和稳定的整体。世纪以来，科学家们一直在研究这个有趣的同时也是视觉中的基本问题。一些理论更重视视网膜外信号（例如传出复制）的作用，而另一些理论则强调眼跳后视觉信息的作用。一些理论认为，空间表征不是默认的，只有在与任务相关时才会出现。理解这些有争议的发现的方法是假设动作的视觉稳定性和感知的视觉稳定性存在差异。这类似于先前对感知和行动的表征所做的区分。目前的项目提出了一种新的理论方法，表明快速的空间表征主要是由运动系统形成和使用的，因为它们对于与物体的交互至关重要，尽管有中间的扫视，但对于感知来说不那么重要。

About 3-5 times each second we make fast eye movements called saccades in order to examine the world around us. Saccades are necessary to bring the fovea, the part of the retina with the highest acuity, to different areas of a visual scene. However, such manner of exploration poses significant challenges since the locations of objects on the retina change every time we move our eyes. Nevertheless, typically we do not experience that objects shift their positions during saccades and the world is perceived as a coherent and stable whole. More than a century scientists have been working on this intriguing and at the same time fundamental problem in vision. Some of the theories put more weight on the role of extra-retinal signals (e.g. the efferent copy), while others emphasize the role of visual information after saccade. Some theories propose that spatiotopic representations are not default and emerge only if relevant for the task. The way to understand these controversial findings is to assume a difference in visual stability for action and visual stability for perception. This is similar to a previously made distinction between representations for perception and for action. The current project proposes a novel theoretical approach, suggesting that rapid spatiotopic representations are primarily formed and used by the motor system, since they are critical for interaction with the objects despite the intervening saccades and are less critical for perception.