News tagged with white matter

Related topics: brain , magnetic resonance imaging , nerve cells , brain cells , brain injury

Myelin vital for learning new practical skills

New evidence of myelin's essential role in learning and retaining new practical skills, such as playing a musical instrument, has been uncovered by UCL research. Myelin is a fatty substance that insulates ...

Oct 16, 2014
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Scientists show rise and fall of brain volume

(Medical Xpress)—We can witness our bodies mature, then gradually grow wrinkled and weaker with age, but it is only recently that scientists have been able to track a similar progression in the nerve bundles ...

Sep 19, 2014
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Brain aging is conclusively linked to genes

For the first time in a large study sample, the decline in brain function in normal aging is conclusively shown to be influenced by genes, say researchers from the Texas Biomedical Research Institute in San Antonio and Yale ...

Nov 04, 2013
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How does fitness affect the aging brain?

We all know that exercise is good for us—it can help us lower blood pressure and cholesterol, maintain a healthy weight, and even improve mood and sleep. But can exercise improve the brain, especially as ...

Apr 01, 2014
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White matter

White matter is one of the two components of the central nervous system and consists mostly of myelinated axons. White matter tissue of the freshly cut brain appears pinkish white to the naked eye because of myelin is composed largely of lipid and a few percent of capillaries. Its white color is due to its usual preservation in formaldehyde. A 20 year-old male has around 176,000 km of myelinated axons in his brain.

The other main component of the brain is grey matter (actually pinkish tan due to blood capillaries). A third colored component found in the brain that appears darker due to higher levels of melanin in dopaminergic neurons than its nearby areas is the substantia nigra.

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