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Acute metyrapone and propranolol treatments without first context exposure did not modify fear memory. There were no differences between the groups when the treatments were administered without Test 1 re-exposure. VEH + VEH = vehicle group (n = 9); MET + VEH = metyrapone group (n = 8); VEH + PROP = propranolol group (n = 9); MET + PROP = metyrapone and propranolol group (n = 8). & P < 0.05, compared to Test 2, for all groups.
