Erickson R G, Thier P
Neurologische Klinik, Universität Tübingen, Federal Republic of Germany.
Exp Brain Res. 1991;86(3):608-16. doi: 10.1007/BF00230534.
Motion of background visual images across the retina during slow tracking eye movements is usually not consciously perceived so long as the retinal image motion results entirely from the voluntary slow eye movement (otherwise the surround would appear to move during pursuit eye movements). To address the question of where in the brain such filtering might occur, the responses of cells in 3 visuo-cortical areas of macaque monkeys were compared when retinal image motion of background images was caused by object motion as opposed to a pursuit eye movement. While almost all cells in areas V4 and MT responded indiscriminately to retinal image motion arising from any source, most of those recorded in the dorsal zone of area MST (MSTd), as well as a smaller proportion in lateral MST (MST1), responded preferentially to externally-induced motion and only weakly or not at all to self-induced visual motion. Such cells preserve visuo-spatial stability during low-velocity voluntary eye movements and could contribute to the process of providing consistent spatial orientation regardless of whether the eyes are moving or stationary.
在缓慢追踪眼球运动过程中，只要视网膜图像运动完全由自主的缓慢眼球运动引起，背景视觉图像在视网膜上的运动通常就不会被有意识地感知到（否则在追踪眼球运动时周围环境就会显得在移动）。为了解决大脑中这种过滤可能发生在何处的问题，当背景图像的视网膜图像运动由物体运动而非追踪眼球运动引起时，对猕猴三个视觉皮层区域的细胞反应进行了比较。虽然V4区和MT区几乎所有细胞对任何来源引起的视网膜图像运动都不加区分地做出反应，但在MST区背侧区域（MSTd）记录的大多数细胞，以及外侧MST区（MST1）中较小比例的细胞，优先对外部诱导的运动做出反应，而对自我诱导的视觉运动反应微弱或根本没有反应。这些细胞在低速自主眼球运动期间保持视觉空间稳定性，并且无论眼睛是移动还是静止，都可能有助于提供一致空间定向的过程。
