Fig. 2

Total number of Nissl-stained neurons (mean ± SEM) on the left side of substantia nigra pars compacta in experimental groups 2 weeks after the surgery (n = 10 rats per group). **Demonstrates P < 0.01 in comparison with the sham group and ρ indicates P < 0.05 in comparison with 6-OHDA group. There is no significant difference between the sham and 6-OHDA+AO groups (P > 0.05). 6-OHDA 6-hydroxydopamine, 6-OHDA+AO 6-hydroxydopamine plus Althaea officinalis extract