Experiment 1: cannula tip locations. (a) Coronal sections +4.68 to +3.00mm from bregma adopted from Paxinos and Watson [12]. Open diamonds, rats that received saline for both acquisition and retention; filled squares, rats that received saline during acquisition and muscimol during retention; filled diamonds, rats that received muscimol during acquisition and saline during retention; open squares, rats that received muscimol for both acquisition and retention. (b) Representative section through the mPFC stained with cresyl violet, showing tracks from the guide cannula (arrow) and tip of the injection cannula (arrowhead).