nigra


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Related to nigra: substantia nigra, Prunus nigra, Sambucus nigra, Morus nigra, Betula nigra, linea nigra

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 ?
The normal function of the globus pallidus and substantia nigra is to inhibit the thalamus; when the two structures are disinhibited, the thalamus sends increased excitatory impulses to the cortex, propagating excitation of motor neurons.
Recordings (Table 1) of the courtship call of nigra (n = 10) and americana (n = 18) were obtained from sound libraries, individual recordists, and published commercial recordings (Simms 1970, Palmer and Boswall 1972, Ferdinand et al.
This proprietary compound of 3,4',5-trihydroxy-trans-stilbene, Sambucus nigra L.
We used brain parenchyma sonography, an ultrasound technique, to display the tissue echogenicity of the substantia nigra in 59 patients.
Revision of the holotype of Odontolarra (= Lyroda) nigra Cameron, with remarks on its subspecies and the description of a closely related new species from Japan (Hymenoptera, Sphecidae).
In summary, the primary goal of this study was to evaluate whether disordered hematopoiesis regulation via substantia nigra neuron lesion may induce hematological disorders.
For the first time, views of Lewy neurites were provided by [alpha]-synuclein immunohistochemistry, which allows researchers to stage Parkinson's disease and to see that it begins not in the nigra but in the lower brain stem, olfactory bulbs, or other areas, he said.
subintegerrima, Juglans nigra and Maclura pomifera) also occur.
Acer saccharum, juglans nigra, pterocarpus soyauxii.
Fissurella nigra Lesson, 1831, is one of the species currently extracted by local fishermen in southern Chile.