nigra


Also found in: Dictionary, Thesaurus, Acronyms, Wikipedia.

nigra

 [ni´grah]
substantia nigra. adj., adj ni´gral.

nig·ra

(nī'gră),
In neuroanatomy, the substantia nigra.
[L. fr. niger, black]

nigra

/ni·gra/ (ni´grah) [L.] substantia nigra.ni´gral

nigra

A regional term for marijuana.

nig·ra

(nī'gră)
neuroanatomy The substantia nigra
[L. fr. niger, black]

nigra

[L.] black; see substantia nigra.
References in periodicals archive ?
Substantia nigra hyperechogenicity: Validation of transcranial sonography for Parkinson disease diagnosis in a large Estonian cohort.
nigra by the following pelage characteristics: 1, no or few creamy-white guard hairs on the back, compared with creamy-white guard hairs on the waist and buttock areas, but those of P.
What's more, those elevated iron levels seen in the substantia nigra of people with Parkinson's may not be in the neurons themselves.
Por outro lado, e possivel que a reducao na permeabilidade das membranas libere parcialmente os solutos celulares para o meio, ficando parte destes nas sementes, proximos ao tegumento, conforme observado em sementes deterioradas de Dalbergia nigra, em que se verificou reducao do potencial hidrico, resultando na maior e mais rapida hidratacao (BORGES; BORGES; BUCKERIDGE, 2000).
In the presence of Burkholderia multivorans, Scutellospora nigra has shown very good association with Allium cepa.
Dopamine is produced in the neurons of the pars compacta region of the substantia nigra within the basal ganglia, but also in other areas of the CNS and throughout the body (Herrero et al.
Sambucus nigra is a species of flowering shrub or small tree native to Europe and commonly called elder, elderberry or black elder.
Phallusia nigra is one example of a widely distributed species.
Parasaissetia nigra is polyphagous, feeding on host plants from 80 families (Ben-Dov 1993), especially on ornamental plants of tropical origin.
Kashkoli [1] using wood industry in Azarbaijan shargi province indicated the best age for harvesting populus nigra depended on local studies.