with or without the chinese herbal medicine composition of the present invention and wild type wt littermates 6 mice per group as shown in fig1 a the expression levels of sod2 in the hippocampal ca1 region ca1 and the dentate gyrus dg of ad mice treated with the chinese herbal medicine composition of the present invention are enhanced as shown by immunohistochemical staining as shown in fig1 b the expression levels of sod2 in the brain tissues of ad mice treated with the chinese herbal medicine composition of the present invention are significantly enhanced as shown by western blotting p lt 0 01 0 05 in other words the chinese herbal medicine composition of the present invention can increase the activity of superoxide dismutases and inhibit reactive oxygen species to reduce oxidative stress in brain tissue since inflammation is believed to be involved in the pathogenesis and progression of neurologic diseases and tumor necrosis factor alpha tnf u03b1 is a key marker for inflammation whether the expression level of tnf u03b1 in the brain can be reduced by the chinese herbal medicine composition of the present invention is determined fig1 a 18b show the expression levels of tnf u03b1 in the brains of 9 month ad mice treated with or without the chinese herbal medicine composition of the present invention and wild type wt littermates 6 mice per group as shown in fig1 a the expression levels of tnf u03b1 in the hippocampal ca1 region ca1 and the dentate gyrus dg of ad mice treated with the chinese herbal medicine composition of the present invention are reduced as shown by immunohistochemical.