Figure 2. Comparison of oxidative stress levels in the brains of rats in each group.

A: MDA content in the brain tissue of rats in each group (n = 3), electroacupuncture (20 Hz, 1 mA) was applied 15 min/d for 7 d; B: SOD content in the brain tissue of rats in each group; C: GPX content in the brain tissue of rats in each group. MDA: malondialdehyde; SOD: superoxide dismutase; GPX: glutathione peroxidase. One-way analysis of variance was used for comparisons between multiple groups. If the overall difference was statistically significant, the least significant difference t-test was used for further pairwise comparisons. The data are expressed as mean ± standard deviation. Compared with the normal group, ^aP < 0.01; compared with sleep deprivation group, ^bP < 0.05.