The effect of ketamine on rule selectivity in LFP oscillations across regions and tasks, in Monkey A and Monkey C, in theta band (A, B), mid-range frequencies encompassing alpha, beta, and low gamma bands (C, D), and in high gamma band (E, F). The empty bars denote pre-injection rule selectivity, and the filled bars represent post-injection values. The lPFC is shown in orange, and the PPC is in purple. *p < 0.05.