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Dopamine: one of the catecholamine neurotransmitters in the brain; it is derived from tyrosine and is the precursor to norepinephrine and epinephrine; dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement; dopamine receptors mediate its action.Source: CRISP.t is derived from tyrosine and is the precursor to NOREPINEPHRINE and EPINEPHRINE. Dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement. A family of receptors (RECEPTORS, DOPAMINE) mediate its action. Source: MeSH 2007.
Dopaminergic pathways, sometimes called dopaminergic projections, are neural pathways in the brain that transmit the neurotransmitter dopamine from one region of the brain to another.The neurons of the dopaminergic pathways have axons that run the entire length of the pathway.The neurons' somata produce the enzymes that synthesize dopamine, and they are then transmitted via the projecting axons to their synaptic destinations, where most of the dopamine is produced.opaminergic nerve cell bodies in such areas as the substantia nigra tend to be pigmented due to the presence of the black pigment melanin. There are eight dopaminergic pathways.