White matter refers to the part of our brain and spinal cord that contains nerve fibers. It is called "white" because this area is made up of bundles of long, insulated nerves that appear whitish in color. These nerve fibers help transmit messages between different parts of the brain and spinal cord, allowing them to communicate and work together effectively.
Full definition
The volume
of white matter in the brains of overweight people at 50 were similar to that seen in the brains of lean people at 60.
However, despite this reduction
in white matter, cognitive tests did not find any evidence that being overweight was linked to reduced brain function.
In addition, brain imaging studies in rats and humans have shown alterations in gray matter volume and
white matter integrity in the brain caused by the effects of chronic pain.
On the other hand, the ones who did only stretching and balance exercises or had one weight training per week had an increase of
white matter lesions, compared to the first group.
Overall, they found that the less fit people were, the weaker their brain's
white matter connections, and the worse they did on the cognitive tests.
In an earlier study, the researchers found that another nutrient, iron, influenced aspects of both grey and
white matter development.
Generally, a woman's brain is more complicated than a man's because it contains
more white matter than a man's.
Whether your head strikes an object or an object strikes your head, the force of that blow can damage the cerebral cortex or the
deep white matter inside your skull.
They also have
less white matter — the fibers that make connections between areas of the brain.
They found that cognitive performance and
white matter connectivity in the brain predicted how best we can learn to play the two types of games.
This difference in composition is important because grey matter processes information
while white matter integrates information and makes connections between information.
After four more weeks without juggling, the
extra white matter remained, suggesting that the change is permanent.
White matter consists of large bundles of nerve cells that connect different regions of the brain and enable communication between them.
White matter acts like the brain's subway system; it connects different areas of gray matter to each other, helping messages travel quickly.
MRI scans have been used as a diagnostic tool to
detect white matter lesions in the brain but these are not always an indicator of the disease.
The researchers determined that lower fitness levels were associated with
weaker white matter, which in turn correlated with lower brain function.
By comparing the groups, the researchers were able to tease out genes associated with the structural integrity
of white matter.
White matter integrity and its association with affective and interpersonal symptoms in borderline personality disorder.
Less white matter could mean less efficient transmission of sensations, whereas extra gray matter could mean nerve cells are sending extra signals.
The patients had undergone diffusion tensor imaging (DTI), an MRI method that assesses the integrity of
white matter tracts in the brain by measuring how easy it is for water to move along them.
These rich data will also allow us to quantify genetic (Chiang et al., 2009) and behavioral variation of
white matter fiber pathways and functional correlations for analysis by the entire community, and help define an optimized methodology for collection of a definitive connectome dataset using DSI (V. J. Wedeen, 2005).
In Experiment 2, DTI was used to examine where in the brain
white matter damage correlated with increased «trait» fatigue in individuals with MS, as assessed by the Fatigue Severity Scale (FSS).
Selective effects of aging on
brain white matter microstructure: A diffusion tensor imaging tractography study
Imaging can reveal the flow of information in the brain: MRI - based imaging of six of the major
white matter pathways in the human brain (© Dr Jamie Kawadler)
Kato T, Murashita J, Kamiya A, Shioiri T, Kato N, Inubushi T. Decreased brain intracellular pH measured by 31P - MRS in bipolar disorder: a confirmation in drug - free patients and correlation
with white matter hyperintensity.
Imaging various sections of
white matter from different angles can help researchers focus on the brain circuitry important for proper neuron communication.
DTI has been shown to be a more sensitive method of
measuring white matter damage and may provide images that better correlate with cognitive dysfunction.
The mean perpendicular edge motion across the entire brain surface produces a change image that can be converted into estimates of rate of atrophy reflecting changes in both grey and white matter [31].
MRIs show that babies with fragile X syndrome had less - developed
white matter compared to infants that did not develop the condition.
Patients showing gadolinium in the vitreous chamber at the later timepoint tended to be of older age, have a history of hypertension, and have more bright spots on their brain scans,
called white matter hyperintensities, that are associated with brain aging and decreased cognitive function.
Lesions in
white matter tissue are evidence of a mini-stroke or some other problem impeding blood flow within the brain.
An MRI revealed no sign of angiopathy in the carotid and vertebral arteries but did reveal evidence of deep
white matter disease, demyelination and possible multiple sclerosis.
White matter appears white because of the density of axons, the signal - carrying cables allowing communication between different brain regions responsible for complicated tasks such as language and memory.
Phrases with «white matter»