Roy J P, Wurtz R H
Laboratory of Sensorimotor Research, National Eye Institute, National Institutes of Health, Bethesda, Maryland 20892.
Nature. 1990 Nov 8;348(6297):160-2. doi: 10.1038/348160a0.
Movement of an observer through the environment generates motion on the retina. This optic flow provides information about the direction of self-motion, but only if it contains differential motion of elements at different depths. If the observer tracks a stationary object while moving in a direction different from his line of sight, the images of objects in the foreground and in the background move in opposite directions. We have found neurons in the cerebral cortex of monkeys that prefer one direction of motion when the disparity of a stimulus corresponds to foreground motion and prefer the opposite direction when the disparity corresponds to background motion. We propose that these neurons contribute a signal about the direction of self-motion.
观察者在环境中的移动会在视网膜上产生运动。这种视觉流提供了关于自身运动方向的信息，但前提是它包含不同深度元素的差异运动。如果观察者在与视线不同的方向移动时追踪一个静止物体，前景和背景中物体的图像会向相反方向移动。我们在猴子的大脑皮层中发现了一些神经元，当刺激的视差对应于前景运动时，这些神经元偏好一个运动方向，而当视差对应于背景运动时，它们则偏好相反的方向。我们认为这些神经元提供了一个关于自身运动方向的信号。
