Steiner V, Blake R, Rose D
Department of Psychology, Vanderbilt University, Nashville, TN 37240.
Perception. 1994;23(10):1197-202. doi: 10.1068/p231197.
The motion aftereffect demonstrates the existence of direction-selective mechanisms in the visual system. However, direction-selective cells exist within many visual areas, including V1 and MT/V5. Can motion aftereffects be generated within each of these areas? In visual cortical areas beyond V1 almost all cells are binocular, whereas a smaller percentage are binocular in V1. The degree of binocularity can be revealed psychophysically by assessing interocular transfer. Interocular transfer of motion aftereffects generated from expanding rotating, and translating dynamic random-dot patterns were therefore compared, since these stimuli should activate cells in higher visual areas selectively. Partial interocular transfer was found that was greater for expansion and rotation than for translation. The results support the involvement of higher visual areas in motion aftereffects to complex animation sequences.
运动后效证明了视觉系统中存在方向选择性机制。然而，包括V1和MT/V5在内的许多视觉区域都存在方向选择性细胞。这些区域中的每一个都能产生运动后效吗？在V1以外的视觉皮层区域，几乎所有细胞都是双眼的，而在V1中双眼细胞的比例较小。双眼性程度可以通过评估双眼间转移来心理物理学地揭示。因此，比较了由扩展、旋转和平移动态随机点图案产生的运动后效的双眼间转移，因为这些刺激应该选择性地激活更高视觉区域的细胞。发现存在部分双眼间转移，扩展和旋转的转移比平移的更大。结果支持了更高视觉区域参与对复杂动画序列的运动后效。
