White matter (Substantia alba)

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Synonyms
Substantia alba

The Brain and Spinal cord are divided into gray matter (Substantia grisea) and white matter (Substantia alba). White matter is composed of nerve fiber bundles. The white color responsible for the naming of white matter is due to the lipid-containing myelin sheaths of the axons.

Imaging

White Matter on MRI
Visualization of the white matter on MRI (for example, marked with a red arrow) on an axial MDEFT MRI sequence.

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