Figure 3. Effects of amphetamine sensitization and N-acetylcysteine (NAC) on locomotion. NAC partially prevented the increased locomotion induced by amphetamine (AMPH) challenge in sensitized animals. Mean + standard error, n=10-11. * p < 0.05 compared to saline (SAL/SAL); ^† p < 0.05 compared to NAC/AMPH.