Perception of complex motion in humans and pigeons (Columba livia)
Perception of complex motion in humans and pigeons (Columba livia)
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DOI：
10.1007/s00221-014-3876-2
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发表时间：
2014-06-01
影响因子：
2
通讯作者：
Wylie, Douglas R.
中科院分区：
文献类型：
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作者：
Nankoo, Jean-Francois;Madan, Christopher R.;Wylie, Douglas R.
在灵长类动物的视觉系统中，局部运动信号被汇集以创建全局运动感知。像灵长类动物一样，许多鸟类高度依赖视觉生存，但对鸟类的运动感知知之甚少。我们使用随机点刺激来研究鸽子与人类相比检测复杂运动（径向，旋转和螺旋）的能力。与螺旋运动相比，我们的人类参与者对旋转和径向运动的阈值明显较低。然而，来自鸽子的数据表明，鸽子对旋转运动最敏感，对径向运动最不敏感，而对螺旋运动的敏感性居中。我们跟踪鸽子的结果，调查显示孔径形状对旋转运动和径向运动的速度梯度的影响。我们发现没有影响的形状的光圈阈值，但观察到，径向运动加速点提高阈值。然而，这种改善没有达到旋转运动观察到的阈值水平。总之，我们的实验表明，鸽子运动系统中的池机制是最有效的旋转。
In the primate visual system, local motion signals are pooled to create a global motion percept. Like primates, many birds are highly dependent on vision for their survival, yet relatively little is known about motion perception in birds. We used random-dot stimuli to investigate pigeons' ability to detect complex motion (radial, rotation, and spiral) compared to humans. Our human participants had a significantly lower threshold for rotational and radial motion when compared to spiral motion. The data from the pigeons, however, showed that the pigeons were most sensitive to rotational motion and least sensitive to radial motion, while sensitivity for spiral motion was intermediate. We followed up the pigeon results with an investigation of the effect of display aperture shape for rotational motion and velocity gradient for radial motion. We found no effect of shape of the aperture on thresholds, but did observe that radial motion containing accelerating dots improved thresholds. However, this improvement did not reach the thresholds levels observed for rotational motion. In sum, our experiments demonstrate that the pooling mechanism in the pigeon motion system is most efficient for rotation.