substantia nigra


substantia nigra
sub·stan·tia ni·gra səb-.stan-chē-ə-'nī-grə, -'nig-rə n, pl sub·stan·ti·ae ni·grae -chē-.ē-'nī-(.)grē, -'nig-(.)rē a layer of deeply pigmented gray matter situated in the midbrain and containing the cell bodies of a tract of dopamine-producing nerve cells whose secretion tends to be deficient in Parkinson's disease

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[TA] black substance: the layer of melanin-containing neurons that separates the tegmentum of the midbrain from the crus cerebri; it includes a posterior compact part with many pigmented dopaminergic cells (pars compacta) and an anterior reticular part whose cells contain little pigment (pars reticularis).

Substantia nigra in a section through the rostral midbrain.


Medical dictionary. 2011.

Look at other dictionaries:

  • substantia nigra — [səb stan′shē ə nī′grə] n. pl. substantiae nigrae [səb stan′shē ē΄ nī′grē] substantia nigras a layer of dark cells in the midbrain that produce the neurotransmitter dopamine: Parkinson s disease is caused by an inadequate supply of dopamine …   English World dictionary

  • SUBSTANTIA NIGRA — Soemmeringi, s. locus niger, входит в состав экстрапирамидпой системы. S. п. расположена в среднем и промежуточном мозгу: в среднем мозгу в ножке мозга, между покрышкой и основанием, между nucleus ruber и пирамидной системой (см. Мозговые ножки,… …   Большая медицинская энциклопедия

  • Substantia nigra — Brain: Substantia nigra Section through superior colliculus showing Substantia nigra …   Wikipedia

  • Substantia nigra — …   Deutsch Wikipedia

  • Substantia nigra — Section transversale du mésencéphale au niveau du colliculus supérieur, laissant apercevoir la substantia nigra. La substantia nigra (substance noire, dite aussi locus niger) est un noyau du système nerveux situé au niveau du mésencéphale et du… …   Wikipédia en Français

  • Substantia nigra — juodoji medžiaga statusas T sritis gyvūnų anatomija, gyvūnų morfologija atitikmenys: lot. Substantia nigra ryšiai: platesnis terminas – vidurinių smegenų pjūviai siauresnis terminas – tankioji dalis siauresnis terminas – tinklinė dalis …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • substantia nigra — /seuhb stan shee euh nuy greuh, nig reuh/, pl. substantiae nigrae /sub stan shee ee nuy gree, nig ree/, substantia nigras. a deeply pigmented area of the midbrain containing dopamine producing nerve cells. [1880 85; < NL: black substance] * * * …   Universalium

  • substantia nigra — sub•stan•ti•a ni•gra [[t]səbˈstæn ʃi ə ˈnaɪ grə, ˈnɪg rə[/t]] n. pl. sub•stan•ti•ae ni•grae [[t]sʌbˈstæn ʃiˌi ˈnaɪ gri, ˈnɪg ri[/t]] substantia ni•gras anat. a deeply pigmented area of the midbrain containing dopamine producing nerve cells •… …   From formal English to slang

  • substantia nigra — noun (plural substantiae nigrae) Etymology: New Latin, literally, black substance Date: circa 1882 a layer of deeply pigmented gray matter situated in the midbrain and containing the cell bodies of a tract of dopamine producing nerve cells whose… …   New Collegiate Dictionary

  • Substantia Nigra — …   Deutsch Wikipedia


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