Figure 1.

RF structure, stimulus size, light polarity, and negative afterimages. A, Schematic of RFs and stimulus characteristics that drive size-dependent responses of ON and OFF cells. Same or opposite-polarity stimuli signify a light polarity that aligns with or is opposite to the ON- or OFF-center response. For opposite-polarity stimuli, on stimulus removal, there is a post-stimulus rebound that depends on the preceding stimulus. B, Schematic of a pictorial negative afterimage that is dependent on the initial post-stimulus rebound responses of ON and OFF cells (overlaid).