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Noun
1. substantia nigraAnatomy
Wikipedia definition
2. Substantia nigraThe substantia nigra is a brain structure located in the mesencephalon (midbrain) that plays an important role in reward, addiction, and movement. Substantia nigra is Latin for "black substance", reflecting the fact that parts of the substantia nigra appear darker than neighboring areas. This is due to high levels of melanin in dopaminergic neurons. Parkinson's disease is characterized by the death of dopaminergic neurons in the substantia nigra pars compacta.
Read “Substantia nigra” on English Wikipedia
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Read “Substantia nigra” on DBpedia

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