| Simulations of the model were performed with cutting off feedback connections from the readout units to the reservoirs just after stimulus onset. Neural trajectories mapped onto the choice axis (top) and stimulus axis (middle) are shown in different trial types (FH: green, FL: red, left: solid, right: dotted) with (thin) and without (thick) feedback connections. As in the rats, continuous increases in the separation of neural trajectories are terminated after the removal of familiar cues. The axes were identical as those used in Fig. 3f from neural dynamics in the presence of the feedback. Dynamics of L- (green) and R- (red) readout neurons without feedback indicates that decision-making is possible even without the feedback (bottom). Shaded areas represent the standard deviations of the trajectories over trials. These results were obtained from 44 FH→left, 44 FL→right successful trials and 6 FH→right and 6 FL→left unsuccessful simulation trials in a network model.