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Myelin

Medical term · M

A fatty material that surrounds and protects some nerve fibers.

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Related terms

Multiple sclerosis

An autoimmune disease in which the body’s immune system mistakenly attacks myelin, the substance that covers nerve fibers.
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The inner portion of the brain, composed primarily of axons, each surrounded by a myelin sheath that insulates the nerve fibers (and appears white). Messages are sent between…
Mydriatic

A type of drug that widens the pupil.

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