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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Do visual cues contribute to the neural estimate of viewing distance used by the oculomotor system?
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Do visual cues contribute to the neural estimate of viewing distance used by the oculomotor system?

机译：视觉提示是否有助于动眼神经系统对视距的神经估计？

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摘要

Perceived shape and depth judgments that require knowledge of viewing distance are strongly influenced by both vergence angle and the pattern of vertical disparities across large visual fields. On the basis of this established contribution of visual cues to the neural estimate of viewing distance, we hypothesized that the oculomotor system would also make use of high-level visual cues to distance. To address this hypothesis, we investigated how compensatory eye movements during whole-body translation scale with viewing distance. Monkeys viewed large-field (85 x 68 degrees ) random-dot stereograms that were rear projected onto a fixed screen and simulated either a textured wall or pyramid at different viewing distances. In these stereograms, we independently manipulated vergence angle, horizontal and vertical disparity gradients, relative horizontal disparities, and textural cues to viewing distance. For comparison, random-dot patterns were also projected onto a moveable screen placed at different physical distances from the animal. Several cycles of left-right sinusoidal motion of the monkey at 5 Hz were interleaved with several cycles of motion in darkness, and the relationship between eye movement responses and viewing distance was quantified. As expected from previous work, the amplitude of compensatory eye movements depended strongly on vergence angle. Although visual cues to distance had a statistically significant effect on eye movements, these effects were approximately 20-fold weaker than the effect of vergence angle. We conclude that sensory and motor systems do not share a common neural estimate of viewing distance and that the oculomotor system relies far less on visual cues than the perceptual system.
机译：需要观察距离知识的感知形状和深度判断受发散角和跨大视野的垂直视差模式的强烈影响。基于视觉提示对观看距离的神经估计的确定贡献，我们假设动眼系统也将利用高级视觉提示来实现距离。为了解决这个假设，我们研究了在整个视平移视场范围内的补偿性眼动如何随观察距离而变化。猴子观看了大视野（85 x 68度）的随机点立体图，这些立体图被背面投影到固定的屏幕上，并在不同的观看距离下模拟了纹理墙壁或金字塔。在这些立体图中，我们独立地控制了发散角，水平和垂直视差梯度，相对水平视差以及纹理提示以查看距离。为了进行比较，还将随机点图案投影到与动物处于不同物理距离的可移动屏幕上。在黑暗中，猴子在5 Hz的左右左右正弦运动的几个周期与几个运动周期交织在一起，并量化了眼睛运动响应与观察距离之间的关系。正如先前工作所预期的那样，补偿性眼球运动的幅度很大程度上取决于发散角。尽管视觉提示距离对眼动有统计学上的显着影响，但这些影响比发散角的影响弱约20倍。我们得出的结论是，感觉系统和运动系统并不共享对视距的共同神经估计，并且动眼系统对视觉提示的依赖程度远少于对感知系统的依赖。

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