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. Author manuscript; available in PMC: 2012 May 19.
Published in final edited form as: Neuroscience. 2011 Mar 22;182:98–104. doi: 10.1016/j.neuroscience.2011.03.023

Figure 2.

Figure 2

Bars represent mean percentage freezing behavior (±SEM). Using similar parameters to our immediate shock control in Experiment 1 we showed minimal freezing when a group of animals was pre-exposed to a different context (Context B) from the training context (B/IMM, dark gray bar) and given an immediate shock in Context A the following day. In contrast, animals that received pre-exposure to Context A and an immediate shock in that context the next day showed significant fear memory (A/IMM, light gray bar). This experiment demonstrates that with parameters similar to those used in Experiment 1 we attain the immediate shock freezing deficit.