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Representative photomicrographs of sections of the substantia nigra from (A) Vehicle. (B) Rotenone only. (C) Rotenone +amphetamine 0.5 mg/kg. (D) Rotenone+amphetamine 1 mg/kg. (E) Rotenone+amphetamine 2 mg/kg. Black arrows; degenerated neuronal cells. Green arrows; healthy dendritic pigmented neurons (H&E x 200 & 400)
