Dopamine is a neurotransmitter, which is a chemical substance in the brain that transmits signals between neurons. It plays a crucial role in the brain’s reward and pleasure centers, as well as in regulating movement, attention, and learning. Dopamine is produced in several areas of the brain, including the substantia nigra and the ventral tegmental area. Dysfunction in the dopamine system has been linked to a range of neurological and psychiatric disorders, such as Parkinson’s disease, schizophrenia, and addiction.