Fig. 5From: Differential hippocampal protein expression between normal mice and mice with the perioperative neurocognitive disorder: a proteomic analysisThe percentage of freezing time of fear memory tests. The percentage of freezing time of contextual fear memory tests declined in PND group vs control group (P < 0.05) and there was no significant difference in the percentage of freezing time of auditory fear memory tests between two groups (P > 0.05)Back to article page