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Fig. 1. Significant differences in fear behaviors between single-, pair-exposed rats and naïve rats during the retention period. (A) Schematic timeline of the experimental procedures. The experiment consisted of four sessions: habituation, learning, retention, and recording. (B) In the retention session, pair-exposed rats and naïve rats showed a significant decrease in freezing behavior duration and step-through latency, and a significant increase in black-compartment preference and the number of entries compared to single-exposed rats (one-way ANOVA, Tukey’s post-hoc test; *p<0.05, **p<0.01).
Exp Neurobiol 2021;30:48~58
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