Haarmeier T, Bunjes F, Lindner A, Berret E, Thier P
Department of Cognitive Neurology, University of Tübingen, 72076, Tübingen, Germany.
Neuron. 2001 Nov 8;32(3):527-35. doi: 10.1016/s0896-6273(01)00486-x.
We usually perceive a stationary, stable world and we are able to correctly estimate the direction of heading from optic flow despite coherent visual motion induced by eye movements. This astonishing example of perceptual invariance results from a comparison of visual information with internal reference signals predicting the visual consequences of an eye movement. Here we demonstrate that the reference signal predicting the consequences of smooth-pursuit eye movements is continuously calibrated on the basis of direction-selective interactions between the pursuit motor command and the rotational flow induced by the eye movement, thereby minimizing imperfections of the reference signal and guaranteeing an ecologically optimal interpretation of visual motion.
我们通常感知到一个静止、稳定的世界，并且尽管眼球运动会引起连贯的视觉运动，但我们仍能够根据视觉流正确估计前进方向。这种感知不变性的惊人例子源于将视觉信息与预测眼球运动视觉后果的内部参考信号进行比较。在这里，我们证明了预测平稳跟踪眼球运动后果的参考信号是基于跟踪运动指令与眼球运动引起的旋转流之间的方向选择性相互作用而持续校准的，从而最小化参考信号的不完美之处，并保证对视觉运动进行生态上最优的解释。
