Nervous System Dopamine
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Dopamine , also called hydroxytyramine , a nitrogen-containing organic compound formed as an intermediate compound from dihydroxyphenylalanine ( dopa) during the metabolism of the amino acid tyrosine . It is the precursor of the hormones epinephrine and norepinephrine . Dopamine also functions as a neurotransmitter —primarily by inhibiting the transmission of nerve impulses—in the substantia nigra, basal ganglia , and corpus striatum of the brain .