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The effects of PD149163, injected immediately after the information trial, on retention trial memory errors (top) and retention trial duration (bottom) conducted 24 hours after the information trial in male Long Evans (black bars) and Brown Norway (grey bars) rats. The bars represent means (+/−SEM). + and ++ indicate a significant difference (p < 0.05, and p < 0.01, respectively) compared to saline within the same strain of rats. See text for other details.
