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TagWhite matter of brain

interconnected neurons
3D illustration of Interconnected neurons with electrical pulses.

The Mysterious White Matter of the Brain

It’s difficult to study but turns out to be very important

We all talk about “gray matter,” the cerebral cortex of the brain, thought to be the basis for learning, remembering, and reasoning. But what about “white matter”? Neurologist Christopher Filley has the story as to why we don’t know much about it: This lack of recognition largely stems from the difficulty in studying white matter. Because it’s located below the surface of the brain, even the most high-tech imaging can’t easily resolve its details. But recent findings, made possible by advancements in brain imaging and autopsy examinations, are beginning to show researchers how critical white matter is. White matter is comprised of many billions of axons, which are like long cables that carry electrical signals. Think of them as elongated…