white matter


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Related to white matter: gray matter

white matter

n.
Whitish nerve tissue, especially of the brain and spinal cord, consisting chiefly of myelinated nerve fibers.

white matter

n
(Anatomy) the whitish tissue of the brain and spinal cord, consisting mainly of myelinated nerve fibres. Technical name: substantia alba Compare grey matter

white′ mat`ter



n.
nerve tissue, esp. of the brain and spinal cord, that primarily contains myelinated fibers and is nearly white in color. Compare gray matter (def. 1).
[1830–40]

white matter

The whitish tissue of the brain and spinal cord in vertebrate animals, made up chiefly of nerve fibers covered in myelin sheaths. Compare gray matter.

white matter

Myelin-sheathed nerve fibers.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.white matter - whitish nervous tissue of the CNS consisting of neurons and their myelin sheaths
nerve tissue, nervous tissue - tissue composed of neurons
fibrous astrocyte - star-shaped cells with long processes; found in the white matter of the brain and spinal cord
nerve pathway, nerve tract, pathway, tract - a bundle of myelinated nerve fibers following a path through the brain
central nervous system, CNS, systema nervosum centrale - the portion of the vertebrate nervous system consisting of the brain and spinal cord
Translations

white mat·ter

n. sustancia blanca, tejido nervioso formado en su mayor parte por fibras mielínicas y que constituye el elemento conductor del cerebro y de la médula espinal.
References in periodicals archive ?
Abnormalities in the brain's white matter in patients with insomnia was also detected using DTI, according to the results of another newly published study in Radiology.
The study enrolled 40 right-handed boys and girls with SPD and 41 right-handed typically developing children, and examined the pathways for connectivity of specific white matter tracts in their brain using diffusion tensor imaging (DTI).
People who self-reported using high-potency pot showed signs of damage in the corpus callosum, the major white matter tract connecting the brain's left and right sides.
The study, published in the journal Psychological Medicine, found that frequent use of high-potency cannabis was linked to a biological marker of white matter damage.
Therefore we investigated white matter injury and elucidated mechanisms involved in synaptogenesis and formation of neuronal networks up to adulthood.
MRI indicated that the patient had extensive white matter signal abnormality within the bilateral frontal and parietal lobes with extension into the temporal lobes supporting and initial impression of PRES (Figures 2(a), 2(b), 3(a), and 3(b)).
But white matter matters--studies have revealed it to be less a passive infrastructure and more a superhighway connecting the different regions of the brain so that communication can take place.
Conclusion: We found that white matter hyperintensities was the most common MRI abnormality in our study group which in most of the cases had poor clinical correlation.
Significant fitnessrelated differences were seen in several key white matter regions, including the corpus callosum which joins the brain's left and right hemispheres.
Magnetic resonance imaging of the brain at the beginning of the study and after two years was used to evaluate periventricular and deep white matter lesions.
Another finding which is observed more frequently in the elderly is hyperintense lesions observed in the white matter (HWM) in the sequences which are sensitive to the white matter including the T2, Fluid Attenuated Inversion Recovery (FLAIR) weighted images and on brain magnetic resonance imaging.