<P> The substantia nigra is a basal ganglia structure located in the midbrain that plays an important role in reward and movement . Substantia nigra is Latin for `` black substance '' , reflecting the fact that parts of the substantia nigra appear darker than neighboring areas due to high levels of neuromelanin in dopaminergic neurons . It was discovered in 1784 by Félix Vicq - d'Azyr , and Samuel Thomas von Sömmerring alluded to this structure in 1791 . Parkinson 's disease is characterized by the death of dopaminergic neurons in the substantia nigra pars compacta . </P>
<P> The substantia nigra is a basal ganglia structure located in the midbrain that plays an important role in reward and movement . Substantia nigra is Latin for `` black substance '' , reflecting the fact that parts of the substantia nigra appear darker than neighboring areas due to high levels of neuromelanin in dopaminergic neurons . It was discovered in 1784 by Félix Vicq - d'Azyr , and Samuel Thomas von Sömmerring alluded to this structure in 1791 . Parkinson 's disease is characterized by the death of dopaminergic neurons in the substantia nigra pars compacta . </P>
in parkinson 's disease which part of the brain shows depigmentation
in parkinson 's disease which part of the brain shows depigmentation
the substantia nigra pars compacta
the substantia nigra pars compacta