Effects of RBX in combination with RX821002 on the performance of 5-CSRTT. The graphs showed the effects of RBX 10 mg/kg in combination with RX821002 0.1 mg/kg (N = 10) on the performance of 5-CSRTT in the aspects of correct response rate (A), premature response (B), omission rate (C), correct latency (D) and magazine latency (E). Open bars depicted saline + saline, oblique lattice bars depicted RBX + saline, reticular bars depicted saline + RX821002, and black bars depicted RBX + RX821002. Values are presented as mean+SEM. * P < 0.05.