Myelin

Myelin is a substance that surrounds nerve cells in the brain and ensures their function. This layer differs among different mammals.

Neurons are formed from two main types of cells: neurons and glial cells, whose task is to perform specific functions unique to them alone. Glial cells are found primarily among microglia, pericytes, astrocytes, and ependymocytes. These cells perform receptor functions and create a sheath for myelin oligodendrocytes.