gray matter


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gray matter:

see nervous systemnervous system,
network of specialized tissue that controls actions and reactions of the body and its adjustment to the environment. Virtually all members of the animal kingdom have at least a rudimentary nervous system.
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gray matter

[′grā ‚mad·ər]
(neuroscience)
The part of the central nervous system composed of nerve cell bodies, their dendrites, and the proximal and terminal unmyelinated portions of axons.
References in periodicals archive ?
In the study, the researchers evaluated 1,189 youth between the ages of 8 and 23 who completed magnetic resonance imaging as part of the Philadelphia Neurodevelopmental Cohort, a community-based study of brain development that includes rich neuroimaging and cognitive data, to look at age-related effects on multiple measures of regional gray matter, including gray matter volume, gray matter density, and cortical thickness.
Because these findings are prominent in white matter, it is thought that the effects of alcoholism are greater in white than in gray matter (De la Monte 1988; Harper et al.
Summing up, there is increased evidence of widespread structural alterations in both white and gray matter in OCD patients that include, but are not restricted to, abnormalities in CSTC regions.
For the statistical analysis, regional differences in gray matter voxel were tested by two-sample Student's t-test.
The aim of this pilot study was to compare the gray matter volume between two groups of drug-naive female patients who had or had not experienced SLEs prior to the onset of major depression by high-field magnetic resonance imaging (MRI) and to provide a foundation for large sample follow-up studies to investigate the associations among stress factors, brain structural alterations, and the onset of depression.
The difference seemed to be driven by a loss of gray matter, Dr.
Gray matter thinning is the sculpting of a fully formed, healthy brain.
An expectation-maximization (EM) segmentation technique [30] was used to segment the images into three major tissue classes: gray matter; white matter; and CSF, using both SPGR and T2-weighted MR information as well as spatial priors.
The progression of disability in patients with multiple sclerosis was associated with whole brain, cortical, and putamen atrophy during the first 5 years after diagnosis, driven chiefly by a greater decline in gray matter than in white matter volume, a report shows.
Ge Y, Jensen JH, Lu H, Helpern JA, Miles L, Inglese M, et al.Quantitative assessment of iron accumulation in the deep gray matter of multiple sclerosis by magnetic field correlation imaging.
Though brain gray matter will change with age or disease, it shows steadiness in adulthood [13,14].