Effect of post-surgical OXA injection (A) and perioperative EA (B) on the rat model of post-laparotomy pain, and effect of SB-334867 on OXA analgesia (C) and EA analgesia (D). Data are presented as the mean ± SEM at the indicated time points post-surgery. *P<0.05 versus the saline/model/DMSO group. #P<0.05 versus the sham EA group, &P<0.05 versus the SB-334867 + OXA group, $P<0.05 versus the EA group. Short black line represents the surgery duration. The double-headed arrow represents the EA duration. BL: baseline. SB-pr: pre-surgical injection of SB-334867; SB-ps: post-surgical injection of SB-334867.