Fig. 6.

Neuronal responses account for perceptual judgments of texture. (A) Perceived roughness vs. the first principal component of the cortical population response (r = 0.88). (B) Prediction of the perceived dissimilarity for two different groups of textures based on the firing rates of SA1-like neurons (green; SA1 coefficient > 0.5, n = 53) and PC-like neurons (orange; PC coefficient > 0.5, n = 23). SA1-like cells predict perceived differences in coarse spatial structure, whereas PC-like cells predict perceived differences in fine structure.