Dopamine

**Definition:** 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. A family of receptors (RECEPTORS, DOPAMINE) mediate its action.

**Tree numbers:** - D02.092.211.215.406 - D02.092.311.342 - D02.455.426.559.389.657.166.175.342

**Synonyms:** - 3,4-Dihydroxyphenethylamine - Hydroxytyramine - 4-(2-Aminoethyl)-1,2-benzenediol