Verstraten F A, Fredericksen R E, Grüsser O J, van de Grind W A
Utrecht Biophysics Research Institute, Utrecht University, The Netherlands.
Vision Res. 1994 May;34(9):1149-55. doi: 10.1016/0042-6989(94)90297-6.
Following a period of adaptation to a pattern moving in a particular direction, a subsequently viewed stationary pattern appears to move in the opposite direction for some time: the movement after effect (MAE). The MAE lasts longer when the test pattern is not immediately or not continuously presented after adaptation. This phenomenon is called storage. So far research indicates that storage only occurs when textured visual stimulation is absent during part of the test phase or if the processing of a stationary test stimulus is prevented (e.g. by binocular rivalry). We present evidence that storage-like phenomena can occur even while a textured and moving visual stimulus is phenomenally present. We adapted binocularly to uni-directional motion of a random-pixel array M1 for 60 sec. This stimulus was immediately followed by another moving pattern M2. Its motion direction was orthogonal to that of M1. The presentation time of M2 was the independent variable. A stationary pattern was presented immediately after presentation of M2. The direction of the resulting integrated uni-directional MAE was measured. For short presentation times of M2 there is an integrated uni-directional MAE, which shows an interaction of the output of units stimulated by both moving patterns. However, it appeared that the effect of M1 on the direction of this combined uni-directional MAE is much longer present than would be expected from the MAE duration of M1, when tested in isolation.
在适应了朝特定方向移动的模式一段时间后，随后看到的静止模式在一段时间内似乎会朝相反方向移动：运动后效（MAE）。当测试模式在适应后不是立即呈现或不是连续呈现时，运动后效持续的时间更长。这种现象被称为存储。到目前为止的研究表明，只有当测试阶段的部分时间没有纹理视觉刺激，或者静止测试刺激的处理被阻止时（例如通过双眼竞争），才会发生存储。我们提供的证据表明，即使在有纹理且移动的视觉刺激明显存在的情况下，也可能出现类似存储的现象。我们双眼适应随机像素阵列M1的单向运动60秒。此刺激之后紧接着是另一个移动模式M2。其运动方向与M1的运动方向正交。M2的呈现时间是自变量。在M2呈现后立即呈现一个静止模式。测量由此产生的综合单向运动后效的方向。对于M2的短呈现时间，存在一个综合单向运动后效，它显示了由两个移动模式刺激的单元输出之间的相互作用。然而，当单独测试时，似乎M1对这种组合单向运动后效方向的影响持续的时间比从M1的运动后效持续时间预期的要长得多。
