Fig. 5. Effects of milk powder oxidation diet on the hippocampus-dependent spatial memory of SD rats in the Morris water maze (MWM) test. (A) Diagram of the MWM test, (B) latency in the visible platform task (day 1), (C) speed in the visible platform task (day 1), (D) latency in the hidden platform task (days 2–5), (E) time spend in quadrant, (F) number of crossing of the platform, (G) SWM tracking paths, (H) FWM tracking paths, (I) FWM + LDT tracking paths, (J) FWM + HDT tracking paths,. SWM, 180 °C spray-dried whole milk group; FWM, freeze-dried whole milk group; FWM + LDT freeze-dried whole milk + low dityrosine group; FWM + HDT, freeze-dried whole milk + high dityrosine group. Data are expressed as the mean ± SEM (n = 10 rats per group). Means among bars without a common letter differ, P < 0.05.