Figure 10.

A, Diversity in the shapes of the tuning curves. Black, Delay. Green, Cue. Dashed line, Baseline average firing rate. All the neurons are excitatory except for the last neurons in the second line, which are inhibitory. B, Comparison of the tuning properties of the neurons during the cue and delay periods. Left, The preferred directions are strongly correlated (R² = 0.94). Right, The tuning widths are weakly correlated (R² = 0.02). Only neurons with tuning curves well fitted with von Mises functions for the two periods are included.