1. Dark pigments composed of oxidized dopamine and other catecholamines, found primarily in dopamine-producing neurons of the brain, particularly in the substantia nigra.
Usage: technical; neuroscience; plural form of neuromelanin

Examples

• Neuromelanins accumulate in the substantia nigra as neurons age.
• The buildup of neuromelanins may be associated with Parkinson's disease.
• Researchers study neuromelanins to understand dopamine metabolism in the brain.
• Neuromelanins give certain brain regions their characteristic dark appearance under microscopy.
• The formation of neuromelanins is a natural byproduct of dopamine synthesis.