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Norepinephrine levels in the amygdala in individual animals following inhibitory avoidance training. Percent of baseline norepinephrine following inhibitory avoidance training is graphed for each individual rat. The key notes retention score on the following day. Amygdala norepinephrine levels correlate with 24-hour retention performance. Correlation values for the first five posttraining samples varied from +0.75 to +0.92. From McIntyre et al., 2002.
