Fig. 1.

Pre-training muscimol infusion in the DH impairs recent contextual, but not auditory cued fear memory. a Left, Cannula implantation and drug infusion strategy in DH. Right, Representative brain section showing cannula placement above DH. Arrow indicates estimated location of injection cannula. b Representative brain section showing the spread of muscimol. TMR-X conjugated muscimol was infused to estimate the infusion range of muscimol. c Behavior procedures. d Histogram showing freezing levels to conditioned context (n = 9 per group; two-tailed Student’s t-test, t₍₁₆₎ = 3.696, **p < 0.01). e Histogram showing freezing levels to conditioned tone CS (n = 9 per group; two-way repeated-measures ANOVA followed by Bonferroni’s post-hoc test). Data are mean ± s.e.m. DH, dorsal hippocampus