Fig. 6From: DL-3-n-butylphthalide improved physical and learning and memory performance of rodents exposed to acute and chronic hypobaric hypoxiaEffects of NBP on rats under conditions of acute and chronic hypoxia in the shuttle-box experiment. Frequency of active escapes and duration of active escapes for rats at 5800 m for 6 days (a) and 27 days (b) in the shuttle-box experiments. *P < 0.05 compared with control groupBack to article page