In the CNS, oligodendrocytes extend their processes to wrap around multiple axons, forming the myelin sheath. Conversely, in the PNS, each Schwann cell wraps around a single axon. The process begins with the cell membrane spiraling around the axon, forming layers of tightly packed phospholipids and proteins. This structure is stabilized by adhesion molecules such as myelin basic protein and proteolipid protein.
