White matter - Wikipedia
White matter refers to areas of the central nervous system (CNS) that are mainly made up of myelinated axons, also called tracts. [1] Long thought to be passive tissue, white matter affects learning and brain functions, modulating the distribution of action potentials, acting as a relay and coordinating communication between different brain ...
White matter aging and its impact on brain function - Cell Press
2024年11月13日 · Aging leads to a decrease in white matter volume and damage to myelinated axons, contributing to neurodegeneration. Myelin breakdown can trigger inflammation, creating a vicious cycle that causes further damage. Understanding these changes is key to preventing age-related neurodegenerative disease.
Histology, Myelin - StatPearls - NCBI Bookshelf
2023年5月1日 · In the central nervous system, the myelinated fibers have the collective name of white matter, and the nonmyelinated fibers are collectively known as gray matter as they look white and gray respectively on gross inspection of the brain in sagittal cross-section.
White Matter - an overview | ScienceDirect Topics
White matter is composed of myelinated axons in brain tissue—rendered white on gross pathologic section by the high lipid content of the myelin sheath. Recall from our earlier discussion of Hounsfield units that lower density on CT means a darker color—low-density fat appears a darker gray than does higher-density water.
White matter: Anatomy and function - Kenhub
2023年10月30日 · The term 'white matter' refers to regions within the central nervous system that contain tracts of myelinated axons with supporting cells including astrocytes and microglia, as well as blood vessels and very few neuronal cell bodies.
What Is White Matter In The Brain? - Simply Psychology
2023年9月18日 · White matter in the brain consists of myelinated axons, which are nerve fibers covered by a fatty insulating layer called myelin. This structure allows for rapid transmission of neural signals between brain regions.
Change in the Brain’s White Matter - PubMed Central (PMC)
Histological studies on experimental animals should clarify whether the white matter changes seen by MRI after learning are caused by myelination of unmyelinated axons, increased thickness of myelin on axons that are already myelinated, alterations in axon caliber, branching, or crossing, or other cellular changes.
Unraveling the secrets of white matter – Bridging the gap …
Laid out end to end, the myelinated fibers from one human brain can circle the globe more than three times (Marner et al., 2003). Unraveling the secrets of this remarkable structure raises multiple challenges – not least of which is integrating white matter science at …
White Matter Plasticity in the Adult Brain: Neuron - Cell Press
White matter (WM), consisting of axons connecting different brain regions, constitutes about half of the total human brain volume. Axons can be myelinated or unmyelinated, and it is myelin’s chemical composition of mainly lipids that gives the WM its characteristic color.
CNS myelination requires VAMP2/3-mediated membrane …
2022年9月23日 · Myelin coverage (percent of total axonal surface myelinated) in a region of white matter can be approximated from the product of total number of oligodendrocytes (N) times the average length of ...
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