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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.
Dopamine is an organic chemical of the catecholamine and phenethylamine families that plays several important roles in the human brain and body, as well as elsewhere in biology.Its name derives from its chemical structure: it is an amine formed by removing a carboxyl group from a molecule of L-DOPA.In the brain, dopamine functions as a neurotransmitter âa chemical released by nerve cells to send signals to other nerve cells.The brain includes several distinct dopamine systems, one of which plays a major role in reward-motivated behavior.ts name derives from its chemical structure: it is an amine formed by removing a carboxyl group from a molecule of L-DOPA. In the brain, dopamine functions as a neurotransmitter âa chemical released by nerve cells to send signals to other nerve cells.