Richter J, Ullman S
Biol Cybern. 1986;53(3):195-202. doi: 10.1007/BF00342887.
A theory of early visual information processing proposed by Marr and co-workers suggests that simple cortical cells may be involved in the detection of zero crossing in the retinal output. We have tested this theory by using pairs of adjacent edges (staircases stimuli) and recording from edge-specific simple cells in cat striate cortex. The zero crossing hypothesis gives rise for such stimuli to non-obvious predictions that were generally confirmed by the experiment.
马尔和同事们提出的一种早期视觉信息处理理论认为，简单皮质细胞可能参与视网膜输出中零交叉的检测。我们通过使用成对的相邻边缘（阶梯状刺激）并记录猫纹状皮质中对边缘敏感的简单细胞的活动，对这一理论进行了测试。零交叉假说对这类刺激产生了一些不明显的预测，而实验总体上证实了这些预测。
