Figure 1From: Neuronal nonlinearity explains greater visual spatial resolution for dark than for light stimuliFunctional asymmetries between ON and OFF channels. ON receptive fields are larger than OFF receptive fields (A, B; left) on dark but not gray backgrounds. Luminance response functions are more linear in ON (A; right) than OFF (B; right) channels in the LGN (dots) and V1 (crosses).Back to article page