Fig. 5.

Inhibitory avoidance learning: post-training infusions, 2 mA shock. A, Outline of general procedures.B, Cannula tip placement for all animals included in the analysis (Paxinos and Watson, 1997). C, Mean ± SE percent freezing to light chamber per group averaged across all observation periods (0 nmol, n = 7; 4.4 nmol,n = 8). Groups were not significantly different.D, Mean ± SE percent freezing per group to context during each observation period. No significant differences were observed between groups during any observation period.E, Mean ± SE latency (seconds) to enter the dark chamber during training. Groups did not differ by dose (0 nmol,n = 7; 4.4 nmol, n = 8).F, Mean ± SE latency (seconds) for the difference between testing and training. *p < 0.01 relative to 0 nmol group.