Sensitivity for texture statistics. A, Example responses of V1 (top) and V2 (bottom) units to naturalistic textures (dark traces) and their noise counterparts (light traces). Thickness of line depicts SEM across trials for an example texture family per unit. Units in both V1 and V2 could show low (left) or high (right) modulation between the two stimulus classes. B, Modulation indices for V1 (top) and V2 (bottom) units. Shaded bars represent units with significant modulation indices. C, Average PSTHs for V1 (top) and V2 (bottom) units, averaging over each texture or noise stimulus that generated a measurable response. Responses for each cell were normalized by the strongest peak firing rate observed for that neuron.