<sod>Catecholamines are produced mainly by the [[chromaffin cells]] of the [[adrenal medulla]] and the [[postganglionic fiber]]s of the [[sympathetic nervous system]]. [[Dopamine]], which acts as a [[neurotransmitter]] in the [[central nervous system]], is largely produced in neuronal cell bodies in two areas of the brainstem: the [[substantia nigra]] and the [[ventral tegmental area]].<eod>
<sod>Catecholamines are produced mainly by the [[chromaffin cells]] of the [[adrenal medulla]] and the [[postganglionic fiber]]s of the [[sympathetic nervous system]]. [[Dopamine]], which acts as a [[neurotransmitter]] in the [[central nervous system]], is largely produced in neuronal cell bodies in two areas of the brainstem: the [[ventral tegmental area]] and the [[substantia nigra]], the latter of which contains [[neuromelanin]]-pigmented neurons. The similarly neuromelanin-pigmented cell bodies of the [[locus ceruleus]] produce [[norepinephrine]].<eod>