Wilson H R, Krupa B, Wilkinson F
Visual Science Center, University of Chicago, 939 E. 57th Street, Chicago, Illinois 60637, USA.
Nat Neurosci. 2000 Feb;3(2):170-6. doi: 10.1038/72115.
Certain periodic dot patterns (Marroquin patterns) generate a percept of dynamically oscillating circles, and analogous effects were explored by op artists in the 1960s. Here we show psychophysically that circles are perceived in these patterns only around specific points that are quantitatively predicted by a neural model of configural units hypothesized to reside in cortical area V4. Circles superimposed on the pattern mask perception of illusory circles. A neural model of lateral inhibitory interactions among V4 configural units showing spike-frequency adaptation quantitatively accounts for the human data. The model is consistent with ideas on the neural basis of attention in V4, and it suggests that attention may be biased via neuromodulation of slow hyperpolarizing potentials in cortical neurons.
某些周期性的点图案（马罗金图案）会产生动态振荡圆圈的感知，20世纪60年代的欧普艺术家曾探索过类似的效果。在此我们通过心理物理学方法表明，在这些图案中，圆圈仅在特定点周围被感知到，这些点由假设存在于皮层V4区的构型单元神经模型进行了定量预测。叠加在图案上的圆圈会掩盖虚幻圆圈的感知。V4构型单元之间表现出脉冲频率适应的侧向抑制相互作用神经模型定量地解释了人类数据。该模型与关于V4区注意力神经基础的观点一致，并表明注意力可能通过皮层神经元中缓慢超极化电位的神经调节而产生偏差。
