Effects of Ros, BTTA, MK801 on PWT, PWL in chronic pain models of rats. A. Effects of Ros, BTTA, MK801 on PWT in chronic pain models of rats; B. Effects of Ros, BTTA, MK801 on PWL in chronic pain models of rats. Note: compared with the normal group, **means P < 0.01; compared with DMSO, #means P < 0.05.