Figure 4.

Mean (±SEM) OR (A) and food-cup response (B) during appetitive training, and freezing response during fear conditioning (C) and subsequent extinction trials (D). Orienter and Nonorienter designations refer to those rats that developed a robust OR during appetitive training (Orienters) and those that did not (Nonorienters). Ret refers to the condition in which rats received a single CS exposure 10 min prior to fear conditioning, while No ret designates those rats were only exposed to the conditioning context prior to fear conditioning. Both Orienters and Nonorienters acquired conditioned food cup response (B) while only Orienters showed conditioned OR (A). Both Orienters and Nonorienters achieved comparable freezing levels by the end of fear conditioning trials (C) and displayed similar extinction rates (D) regardless of retrieval condition. However, the Orienters-No Retrieval group showed slightly increased freezing levels both during acquisition and extinction trials.