Figure 4.
Effects of opposite-feature inhibition on firing activity of pyramidal cells and decision-making. A, Buildup rate of neural activity around the direction of the correct target in a four-choice task versus motion coherence. At the same coherence level, the buildup rate rises with increasing Jopp. B, Buildup rates of neural activity around 90° (solid) or 180° (dashed) relative to the direction of the correct target versus motion coherence. The difference between the two cases is enlarged with increasing Jopp. Each data point and error bar in A and B represent the average and SEM over 1000 correct trials, calculated over the period of 190–320 ms after motion onset. C, Spatial distribution of error choices in an eight-choice task with 3.2% coherence. The histograms display the probability of choosing a target at different angular distance Δθ from the correct one for different values of Jopp. Jsim is fixed at 1.1 in all panels.