Werner Reichardt Centre for Integrative Neuroscience, Tübingen University, Tübingen, Germany, 72076.
Hertie Institute for Clinical Brain Research, Tübingen University, Tübingen, Germany, 72076.
Proc Natl Acad Sci U S A. 2022 Jun 14;119(24):e2121860119. doi: 10.1073/pnas.2121860119. Epub 2022 Jun 8.
The foveal visual image region provides the human visual system with the highest acuity. However, it is unclear whether such a high fidelity representational advantage is maintained when foveal image locations are committed to short-term memory. Here, we describe a paradoxically large distortion in foveal target location recall by humans. We briefly presented small, but high contrast, points of light at eccentricities ranging from 0.1 to 12°, while subjects maintained their line of sight on a stable target. After a brief memory period, the subjects indicated the remembered target locations via computer controlled cursors. The biggest localization errors, in terms of both directional deviations and amplitude percentage overshoots or undershoots, occurred for the most foveal targets, and such distortions were still present, albeit with qualitatively different patterns, when subjects shifted their gaze to indicate the remembered target locations. Foveal visual images are severely distorted in short-term memory.
中央凹视觉图像区域为人类视觉系统提供了最高的敏锐度。然而，当中央凹图像位置被投入到短期记忆中时，这种高保真的代表性优势是否仍然存在尚不清楚。在这里，我们描述了人类在回忆中央凹目标位置时出现的一种反常的大失真。我们短暂地呈现了小而高对比度的光点，其偏心度范围从 0.1 到 12°，同时受试者将视线保持在稳定的目标上。短暂的记忆期过后，受试者通过计算机控制的光标指示记忆中的目标位置。就方向偏差和幅度超调或欠调的百分比而言，最大的定位误差出现在最中央凹的目标上，当受试者将视线转移到指示记忆中的目标位置时，这种失真仍然存在，尽管模式有所不同。短期记忆中，中央凹视觉图像严重失真。
