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单词	neuromelanin
释义	neuromelanin noun neu·​ro·​mel·​a·​nin ˌnu̇r-ō-ˈme-lə-nən  ˌnyu̇r- plural neuromelanins : a dark melanin pigment found especially in some dopaminergic neurons of the human substantia nigra Substantia nigra means, literally, "black substance"; researchers now understand that these cells gain their dark coloration from the oxidation of dopamine to form the black pigment neuromelanin. C. Warren Olanow and Ted L. Rothstein compare eumelanin, pheomelanin Word History Etymology neuro- + melanin First Known Use 1957, in the meaning defined above Medical Definition neuromelanin noun neu·​ro·​mel·​a·​nin -ˈmel-ə-nən  : a dark melanin pigment found especially in some dopaminergic neurons of the human substantia nigra … in the brain, tyrosine is converted into dopamine, a neurotransmitter, which in turn gives rise to neuromelanin. Christopher Wills, Discover Substantia nigra means, literally, "black substance"; researchers now understand that these cells gain their dark coloration from the oxidation of dopamine to form the black pigment neuromelanin. C. Warren Olanow and Ted L. Rothstein, American Scientist
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