Figure 10.
Neural activity and decision behavior in a 12-choice task with 0% coherence. A, Sample trials ending in a spontaneous state (Jopp = 1.00 and Jsim = 1.37), decision state (Jopp = 1.06 and Jsim = 1.30), or merging state (Jopp = 1.06 and Jsim = 1.00). B–E, Maximum firing rate of pyramidal cells versus the external input. B, With homogeneous inhibition (Jopp = 1.00 and Jsim = 1.00), the network state converts directly from a spontaneous state to a merging state as the external input rises. C, With similar-feature inhibition only (Jopp = 1.00 and Jsim = 1.37), the spontaneous state is too stable to be broken by physiologically reasonable inputs. D, With opposite-feature inhibition only (Jopp = 1.06 and Jsim = 1.00), the spontaneous state is easier to break, yet the merging state is still more stable than the decision state. E, With both opposite-feature and similar-feature inhibition (Jopp = 1.06 and Jsim = 1.30), there is a region of external input in which the decision state is more stable than the other two states.