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Schematic of Experimental Design. Rats underwent the conditioned place aversion (CPA) paradigm to index for avoidance of predator odor-paired chamber. In Experiment 1, all rats received a subcutaneous vehicle injection prior to neutral conditioning. Rats were randomized to receive either vehicle or corticosterone pre-treatment prior to odor exposure. In Experiment 2, rats did not receive injections prior to conditioning and were sacrificed at 48 h post-stress for biochemical analysis.
