Wielaard James, Smith R Theodore
J Opt Soc Am A Opt Image Sci Vis. 2013 Oct 1;30(10):2048-65. doi: 10.1364/JOSAA.30.002048.
We introduce a temporal phase mixing model for a description of the frequency-doubling illusion (FDI). The model is generic in the sense that it can be set to refer to retinal ganglion cells, lateral geniculate cells, as well as simple cells in the primary visual cortex (V1). Model parameters, however, strongly suggest that the FDI originates in the cortex. The model shows how noise in the response phases of cells in V1, or in further processing of these phases, easily produces observed behavior of FDI onset as a function of spatiotemporal frequencies. It also shows how this noise can accommodate physiologically plausible spatial delays in comparing neural signals over a distance. The model offers an explanation for the disappearance of the FDI at sufficiently high spatial frequencies via increasingly correlated coding of neighboring grating stripes. Further, when the FDI is equated to vanishing perceptual discrimination between asynchronous contrast-reversal gratings, the model proposes the possibility that the FDI shows a resonance behavior at sufficiently high spatial frequencies, by which it is alternately perceived and not perceived in sequential temporal frequency bands.
我们引入了一种时间相位混合模型来描述倍频错觉（FDI）。该模型具有通用性，因为它可以设定为指代视网膜神经节细胞、外侧膝状体细胞以及初级视觉皮层（V1）中的简单细胞。然而，模型参数强烈表明FDI起源于皮层。该模型展示了V1中细胞响应相位的噪声，或者这些相位的进一步处理过程中的噪声，是如何轻易地产生作为时空频率函数的FDI起始的观测行为。它还展示了这种噪声如何在比较远距离的神经信号时适应生理上合理的空间延迟。该模型通过相邻光栅条纹的编码相关性增加，解释了在足够高的空间频率下FDI的消失。此外，当FDI等同于异步对比度反转光栅之间消失的感知辨别时，该模型提出了一种可能性，即FDI在足够高的空间频率下表现出共振行为，通过这种行为它在连续的时间频带中交替被感知和不被感知。
