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.
For more information about the topic Myelin, read the full article at Wikipedia.org, or see the following related articles:
Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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