Fig. 1. Learning and memory ability in rats of the three experimental groups. The Morris water maze test was conducted before or on postoperative days 7, 14, and 21. The swimming distance (A), escape latency (B), and average velocity (C) were recorded in the NS, AD, and AD+HBO groups (D). The track path was recorded on postoperative day 21. n=8. ^*p<0.05 compared with NS, ^†p<0.05 compared with AD. NS, normal saline; AD, Alzheimer’s disease; HBO, hyperbaric oxygen.