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PNMT fiber innervation of midbrain dopamine areas. PMNT immunostaining is dark blue, TH staining is brown. The tissue was counterstained with methyl green. Arrows indicate examples of PNMT varicosities within the VNAB subjects. Notice that the density of varicosities varied between areas. The RRF (A8 area) was densely covered by PMNT varicosities. Lesser amounts of PMNT varicosities were observed in substantia nigra (A9 area) and the A10 area.
