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. Author manuscript; available in PMC: 2009 Dec 12.
Published in final edited form as: Behav Brain Res. 2008 Jul 18;194(2):201–206. doi: 10.1016/j.bbr.2008.07.011

Figure 2.

Figure 2

Effects of entorhinal cortex or fornix lesions on the acquisition, extinction, and renewal of auditory fear conditioning. (A) Percentage of freezing behavior on the conditioning day. Data are averages for the 3-min baseline (BL) and for 1-min periods after each of the five tone-shock conditioning trials. (B) Percentage of freezing behavior during the exposure session prior to extinction. (C) Percentage of freezing during the 45- trial extinction session. Data are averages of the 2-min baseline (BL) followed by averages of the 1-min post-CS intervals collapsed across 5-trial blocks. (D) Percentage of freezing behavior during the renewal test session. Data are averages of freezing during the entire 8-min tone CS for rats tested in either the extinction context (SAME) or a different context from extinction (DIFF). All data are presented as means ±SEM. EC, entorhinal cortex lesion; FX, fornix lesion; SH, sham surgery.