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Total number of DCX positive cells in the DG declines sharply with age. More DCX positive cells are seen in the granule cell layer of the DG in young animals than in old animals. (A) DCX positive cells in a 7.9 years-old animal. (B) DCX positive cells in a 24.5 years-old animal. Scale bar for (A,B) = 20 μm. (C) There is a significant decline in the number of DCX positive cells present with increasing age.
