MST neurons code for visual motion in space independent of pursuit eye movements
MST neurons code for visual motion in space independent of pursuit eye movements
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DOI：
10.1152/jn.01054.2006
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发表时间：
2007-05-01
影响因子：
2.5
通讯作者：
Kawano, Kenji
中科院分区：
文献类型：
--
作者：
Inaba, Naoko;Shinomoto, Shigeru;Kawano, Kenji
当一个人跟踪一个小的移动物体时，视觉场景背景中的视觉图像在他/她的视网膜上移动。然而，可以估计图像的实际运动，而不管眼睛运动引起的运动。为了了解独立于眼球运动重建稳定视觉世界的神经机制，我们探索了猴子皮层中的MT（中颞）和MST（内侧上级颞）区域，这两个区域都是视觉运动分析所必需的。我们记录了神经元对屏幕上短暂出现的移动纹理图像的反应，而猴子正在执行平稳的追求或固定的固定任务。虽然在这两个领域的神经元表现出显着的反应，方向选择性的纹理图像的运动，MST神经元的反应大多与独立的追求眼球运动的屏幕上的图像的运动，而MT神经元的反应大多与视网膜上的图像的运动。因此，这些MST神经元比MT神经元更有可能区分外部和自我诱导的运动。这些结果与MST神经元编码外部世界中的视觉运动的想法一致，同时补偿由于追踪眼球运动而导致的视网膜图像的反向旋转。
When a person tracks a small moving object, the visual images in the background of the visual scene move across his/her retina. It, however, is possible to estimate the actual motion of the images despite the eye-movement-induced motion. To understand the neural mechanism that reconstructs a stable visual world independent of eye movements, we explored areas MT (middle temporal) and MST (medial superior temporal) in the monkey cortex, both of which are known to be essential for visual motion analysis. We recorded the responses of neurons to a moving textured image that appeared briefly on the screen while the monkeys were performing smooth pursuit or stationary fixation tasks. Although neurons in both areas exhibited significant responses to the motion of the textured image with directional selectivity, the responses of MST neurons were mostly correlated with the motion of the image on the screen independent of pursuit eye movement, whereas the responses of MT neurons were mostly correlated with the motion of the image on the retina. Thus these MST neurons were more likely than MT neurons to distinguish between external and self-induced motion. The results are consistent with the idea that MST neurons code for visual motion in the external world while compensating for the counter-rotation of retinal images due to pursuit eye movements.