substantia nigra(redirected from Soemmerring, Samuel Thomas von)
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substantia ni·gra(nī′grə, nĭg′rə)
A layer of large pigmented nerve cells in the midbrain that produce dopamine and whose destruction is associated with Parkinson's disease.
[New Latin : Latin substantia, substance + Latin nigra, feminine of niger, black.]
substantia nigra(səbˈstænʃə ˈnaɪɡrə)
(Anatomy) a layer of grey matter in the brain that produces dopamine and contains pigmented nerve cells, loss of which has been associated with Parkinson's disease
[C20: from Latin, literally: dark material]
sub•stan•ti•a ni•gra(səbˈstæn ʃi ə ˈnaɪ grə, ˈnɪg rə)
n., pl. sub•stan•ti•ae ni•grae (sʌbˈstæn ʃiˌi ˈnaɪ gri, ˈnɪg ri) substantia ni•gras.
a deeply pigmented area of the midbrain containing dopamine-producing nerve cells.
[1880–85; < New Latin: black substance]
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|Noun||1.||substantia nigra - a layer of deeply pigmented grey matter in the midbrain; associated with the striate body; is involved in metabolic disturbances associated with Parkinson's disease and with Huntington's disease|
neural structure - a structure that is part of the nervous system