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. Author manuscript; available in PMC: 2007 May 30.
Published in final edited form as: Dev Psychobiol. 2001 Nov;39(3):188–198. doi: 10.1002/dev.1044

FIGURE 4.

FIGURE 4

Pre-odor behavioral activation for postnatal Day 8 rat pups receiving either paired or backward odor– shock presentations, or odor-only presentations in Experiment 2. Each data point represents the summation of behavior from two consecutive trials; vertical lines indicate SEM. Conditioning treatment had no effect on behavioral activation before odor presentations (A). Conditioned behavioral activation. The presence of an opioid antagonist during paired presentations of odor and shock disrupted learning (B).