the administration of drugs such as p-chlorophenylalanine ( pcpa ) , 5,6-dihydroxytryptamine ( 5,6-dht ) and fenfluramine that lower the striatal and hypothalamic serotonin ( 5-ht ) content caused an increase in met-enkephalin-like immunoreactive material ( me-ir ) in these brain areas .
C0870814
material
C0006104
brain