Summary of the effects of MT direction column inactivation across our LGN cell sample. (A) Histogram plots the geometric mean values, on a logarithmic scale, for the shift in direction bias index across the population of magno (M), parvo (P) and koniocellular (K) cells tested. Error bars 1 SD. (B) Cumulative probability distribution (cpd) of the magnitude of the change in direction bias index (%) for magno (black), parvo (red) and koniocellular (green) cells. For each cell class, the thicker line plots the actual cpd of the data whereas the thinner line shows the best non-parametric fit to the data.