Figure 11

Why does the Wilson model produce slow alternations with the F&S, but not with swap only and B&S stimuli? Two parameter bifurcation diagram for the Wilson model (1) which defines regions with different dynamical behaviors. Blue curves show the curve of PD bifurcation and the boundary for cycle skipping behavior. Below this curve the dynamical behavior is SIM-Mod. The black dot defines the point at which the Wilson model operates. (A) Comparison of swap and F&S cases. As seen, for swap only stimuli the monocular layer operates in the cycle skipping regime; however, for F&S stimuli it operates in the SIM-Mod regime. The binocular layer for F&S stimuli is effectively stimulated with flickering stimuli and by selecting the current inhibition strength it is possible to get slow rivalry alternations in the second layer. (B) Comparison of swap and B&S cases. Inserting blanks (with 150 ms durations) before swap times, like adding flicker, moves the boundary between Cycle skipping and SIM-Mod regions up in the parameter plane (but to a lesser extent) and the likelihood of being in the SIM-Mod region increases