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首页> 外文期刊>The European Journal of Neuroscience >Motion parallax processing in pigeon (Columba livia) pretectal neurons
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Motion parallax processing in pigeon (Columba livia) pretectal neurons

机译：鸽子前肢神经元的运动视差处理

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In the visual system of invertebrates and vertebrates there are specialised groups of motion-sensitive neurons, with large receptive fields, which are optimally tuned to respond to optic flow produced by the animals' movement through the 3-D world. From their response characteristics, shared frame of reference with the vestibular or inertial system, and anatomical connections, these neurons have been implicated in the stabilisation of retinal images, the control of posture and balance, and the animal's motion trajectories through the world. Using standard electrophysiological techniques and computer-generated stimuli, we show that some of these flow-field neurons in the pretectal nucleus lentiformis mesencephali in pigeons appear to be processing motion parallax. Two large overlapping planes of random dots moving independently were used to simulate motion parallax, in which one with larger dots was moved fast and the other with smaller dots was moved slowly in the opposite direction. Their neural responses to these two superimposed planes were facilitated above those produced by a single plane of moving dots and those produced by two layers moving in the same direction. Furthermore, some of these neurons preferred backward motion in the visual field and others preferred forward motion, suggesting that they may separately code visual objects 'nearer' and 'farther' than the stabilised ('on') plane during forward translational motion. A simple system is proposed whereby the relative activity in 'near', 'far' and 'on' populations could code depth through motion parallax in a metameric manner similar to that employed to code color vision and stereopsis.
机译：在无脊椎动物和脊椎动物的视觉系统中，有专门的运动敏感神经元组，它们具有大的接收场，可以对它们进行优化调整，以响应动物在3D世界中运动产生的光流。从它们的反应特性，与前庭或惯性系统共享的参照系以及解剖学联系来看，这些神经元与视网膜图像的稳定，姿势和平衡的控制以及动物在整个世界的运动轨迹有关。使用标准的电生理技术和计算机生成的刺激，我们显示鸽子中前脑小脑中脑中的某些流场神经元似乎正在处理运动视差。使用两个独立移动的随机点的大重叠平面来模拟运动视差，其中具有较大点的一个快速移动，而具有较小点的另一个沿相反的方向缓慢移动。它们对这两个叠加平面的神经反应比单个点移动平面所产生的神经反应和两层沿相同方向移动所产生的神经反应要容易。此外，这些神经元中的一些优选在视野中向后运动，而其他一些则优选向前运动，这表明它们在向前平移运动期间可以分别将视觉对象编码为比稳定（“ on”）平面“近”和“远”。提出了一个简单的系统，其中“近”，“远”和“上”人群中的相对活动可以通过运动视差以与用于编码彩色视觉和立体视的编码类似的同色异谱方式对深度进行编码。

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