The biogenic monoamines dopamine(DA),norepinephrine(NE)and serotonin(5-hydroxytryptamine,5-HT)are major neuromodulators in the mammalian central nervous system(CNS).DA containing neurons are found in i)the mesolimbic system in which cell bodies in the ventral tegmental area(VTA)project axons into the amygdala,cortex,hippocampus and
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