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Reference Terms
from Wikipedia, the free encyclopedia

Myelin

Myelin is an electrically insulating phospholipid layer that surrounds the axons of many neurons.

It is an outgrowth of glial cells: Schwann cells supply the myelin for peripheral neurons while oligodendrocytes supply it to those of the central nervous system.

The main consequence of a myelin layer (or sheath) is an increase in the speed at which impulses propagate along the myelinated fiber.

Note:   The above text is excerpted from the Wikipedia article "Myelin", which has been released under the GNU Free Documentation License.
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September 30, 2016

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