The number of oligodendrocytes in cerebellar white matter of quail is depicted in the graph. There is a severe depletion of oligodendrocytes after six months of CPZ treatment. Oligodendrocyte no. increases after the arrest of treatment. A non-significant difference in the number of oligodendrocytes can be observed in CPZ, honey and black seed group. Animals in mixture group have significantly higher number of oligodendrocytes than the honey, black seed and CPZ group. Oligodendrocyte number has been presented as mean ± SEM. Bar with same alphabet means no significant difference (P ≤ 0.05).