Figure 4. EA improved neuronal survival after SD. (A) The hippocampus was stained by hematoxylin and eosin. (B) The percentage of intact neurons relative to the total neurons for each group (six different fields were counted per slice). Scale bar=40 μm. Data values were expressed as the mean ± SEM (n=3), #P < 0.05 and ##P < 0.01 vs. control group; *P < 0.05 and **P < 0.01 vs. SD group.