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. 2014 May 15;8:166. doi: 10.3389/fnbeh.2014.00166

Figure 2.

Figure 2

Effects of lidocaine injections into the dHPC and mPFC on memory patterns in the CSD task in non-stress and stress conditions. (A) dHPC. Discrimination 1, D1 Left: Percentage of correct responses in vehicle and lidocaine-injected mice in non-stress and stress conditions. Lidocaine was injected 15 min before stress delivery (which occurred 15 min before test) thus 30 min before behavioral testing. Stress and lidocaine induced a significant decrease of the % of correct responses (***p < 0.001 vs. Vehicle non-stress). (A) Discrimination 2, D2 right: Percentage of correct responses in vehicle and lidocaine-injected mice in non-stress and stress conditions. Stress and lidocaine induced a significant increase of the % of correct responses (***p < 0.001 vs. Vehicle non-stress); (B) mPFC: Discrimination 1, D1: Left: Percentage of correct responses in vehicle and lidocaine-injected mice in non-stress and stress conditions. Stress significantly decreased the % of correct responses (***p < 0.001 vs. Vehicle non-stress); in contrast, lidocaine had no effect in non-stress condition as compared the Vehicle non-stress group (NS) and lidocaine did not blocked the deleterious effect of stress on performance (Lidocaine+stress vs. Lidocaine non-stress; ***p < 0.001). Discrimination 2, D2: right: Percentage of correct responses in vehicle and lidocaine-injected mice in non-stress and stress conditions. Stress induced a significant increase of the % of correct responses (***p < 0.001 vs. Vehicle non-stress). Lidocaine blocked the stress-induced increase of the % of correct responses (***p < 0.001 vs. Vehicle+stress).