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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 7.

FIGURE 7

Number of choices towards the conditioned odor for postnatal Day 8 rat pups receiving either paired (Sal: n = 7, NTX: n = 8) or backward (Sal: n = 7, NTX: n = 7) odor–shock presentations, or odor-only (Sal: n = 7, NTX: n = 8) presentations in Experiment 3. Bars represent mean values; vertical lines indicate SEM. The backward NTX condition has no SEM. Blocking opioids after paired presentations of odor and moderate shock significantly reduced the number of choices made towards the peppermint odor. Sal = saline; NTX = naltrexone.