substantia


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substantia

 [sub-stan´she-ah] (L.)
substance; used in anatomic nomenclature in naming various components of body tissues or structures.
substantia al´ba white matter.
substantia gelatino´sa the substance sheathing the posterior horn of the spinal cord and lining its central canal.
substantia gri´sea gray matter.
substantia ni´gra a dark layer of gray matter separating the tegmentum of the midbrain from the crus cerebri.

sub·stance

(sŭb'stănts),
Material.
Synonym(s): substantia [TA], matter
[L. substantia, essence, material, fr. sub- sto, to stand under, be present]

substantia

/sub·stan·tia/ (sub-stan´shah) pl. substan´tiae   [L.] substance.
substantia al´ba  the white nervous tissue, constituting the conducting portion of the brain and spinal cord, composed mostly of myelinated nerve fibers.
substantia ferrugi´nea  locus caeruleus.
substantia gelatino´sa  the gelatinous-appearing cap forming the dorsal part of the posterior horn of the spinal cord.
substantia gri´sea  gray substance; the gray nervous tissue composed of nerve cell bodies, unmyelinated nerve fibers, and supportive tissue.
substantia ni´gra  the layer of gray substance separating the tegmentum of the midbrain from the crus cerebri.
substantia pro´pria 
1. the tough, fibrous, transparent main part of the cornea, between Bowman's membrane and Descemet's membrane.
2. the main part of the sclera, between the episcleral lamina and the lamina fusca.

sub·stance

(sŭb'stăns)
Material.
Synonym(s): substantia [TA] , matter.
[L. substantia, essence, material, fr. sub-sto, to stand under, be present]

substantia

pl. substantiae [L.] substance.

substantia alba
the white matter of the spinal cord and the brain.
substantia compacta
compact bone.
substantia gelatinosa
the substance sheathing the posterior horn of the spinal cord and lining its central canal.
substantia grisea
the gray matter of the spinal cord and brain.
substantia grisea centralis
the central gray matter that surrounds the cerebral aqueduct.
substantia nigra
the layer of gray substance separating the tegmentum of the midbrain from the crus cerebri.
substantia propria corneae
layer of transparent lamellated fibrous connective tissue which constitutes the bulk of the cornea; composed of collagen fibers disposed in platelike formations, fibroblasts and ground substance with many nerve fibers but no blood vessels.
substantia propria choroid
loose connective tissue of the choroid.
References in periodicals archive ?
Substantia nigra hyperechogenicity: Validation of transcranial sonography for Parkinson disease diagnosis in a large Estonian cohort.
What's more, those elevated iron levels seen in the substantia nigra of people with Parkinson's may not be in the neurons themselves.
Parkinson's disease: a novel MRI method for determining structural changes in the substantia nigra.
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.
Neuronal vascular relationships in the zona compacta of normal and parkinsonian substantia nigra.
Pick bodies were also present in temporal and parietal cortex, caudate and putamen, substantia nigra, locus coeruleus, and pontine nuclei (not shown).
In ventral midbrain, particularly in substantia nigra pathological features show that DA neurons progressively degenerate, DA cannot synthesize in substantia nigra pars compacta.
These brain cells concentrate in the area of the brain known as the substantia nigra.
A: Parkinson's disease (PD) is a serious and common progressive neurological condition resulting from a loss of brain cells in a specific location, the substantia nigra.
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The article is written by Hasan Yakisan, Senior SAP LES Consultant, Substantia Group, Inc.
PD occurs when the neurons that produce dopamine, found in the substantia nigra of the human brain, slowly degenerate and result in a lack of the neurotransmitter dopamine.