# Myelination --- **Myelination** is the presence of a protective coating (called **myelin**) that surround the axons of some [[neurons]]. Myelination done in the [[central nervous system|CNS]] by [[glial cells]] called **oligodendrocytes**, and in the [[peripheral nervous system|PNS]] by glial cells called **neurolemmocytes**. ![[myelination.png]] ## Myelination by Neurolemmocyte **Neurolemmocytes** myelinate portions of the [[peripheral nervous system|PNS]] by physically wrapping themselves around and around the axon. ## Myelination by Oligodendrocyte **Oligodendrocytes** myelinate ___