Figure 4. Spontaneous locomotor activity. Spontaneous locomotor activity was measured at 24 months of age. The differences in spontaneous movements in distance (A), velocity (B), and standing frequency (C) between two groups do not reach statistical significance. Inactive time (D) was significantly lengthened following 1-year adipose-derived mesenchymal stem cell lysate (MSC lysate) (6 sessions). * Significant difference against the Vehicle group, p ≤ 0.05. Abbreviation: MSC, adipose-derived mesenchymal stem cell.