Effect of antagonist SB-269970 (0.1 mg/kg, i.p.) on dose-response effects of LP-211 (mg/kg, i.p.) on micturition volume in SCI, intact and sham rats. *P < 0.05, **P < 0.01, **P < 0.01 and ***P < 0.001 indicate a statistically significant difference comparing intact and SCI. #P < 0.05 and ##P < 0.001 indicate a statistically significant difference comparing sham and SCI.