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Experiment 3. Experimental design (A) and mean percent total time spent freezing (B). Animals received conditioning in two different contexts. Acute IL-Ptx in Context A reduced freezing on Day 1, and this treatment resulted in enhanced extinction learning in Context B on Days 2–7. On Days 8–10, animals tested in the injection context (A) also showed enhanced extinction learning. These results indicate that IL-Ptx enhances extinction learning across contexts. Bars, SE.
