Total GluA1 (A) and pSer845GluA1 (B) protein expression in BLA, vmPFC, NAc and DH of the NoEXT + NoEE (cocaine control), NoEXT + EE (EE alone), EXT + NoEE (extinction alone), and EXT + EE (extinction combined with EE) groups. Data are the mean (± SEM) values normalized to the cocaine control. ** p<0.05 compared to NoEXT (main effect of EXT); ^ p<0.05 compared to the cocaine control; # p<0.05 compared to EE alone.