Figure 2. Locomotor response of intact and gonadectomized male rats to different doses of cocaine.
Total horizontal (A) and stereotyped (B) activity of INT and GDX male rats is presented as the mean sum ± SEM of the first 30 minutes after a single injection of saline (0.9%) or cocaine (10, 15 or 30mg/kg); N: Saline: INT = 8, GDX = 8; 10mg/kg: INT = 11, GDX = 10; 15mg/kg: INT = 30 (STRCNT) 31(HACTV), GDX = 29; 30mg/kg: INT = 9, GDX = 9. Cocaine increased locomotor activity of all animals compared to their saline counterpart. Gonadectomy enhanced the locomotor response to 15 and 30mg/kg of cocaine when compared to intact males. * p<0.05 compared to LMA of INT animals with the same dose of cocaine.