Fig. 7. Reversal of effects of abdominal surgery on ambulatory behavior by morphine and ketorolac. The ambulatory counts are shown 24 h after sham (sham) or abdominal (incision) surgery after injection of saline or the given doses of morphine in the absence ( open circles ) or presence ( filled circles ) of 5 mg/kg ketorolac. The bar labeled Ketorolac represents data after abdominal surgery from animals given ketorolac (5 mg/kg) alone. * Significantly different from animals given saline after sham surgery, P ≤ 0.05.