glial cell

A glial cell is a cell of the central nervous system that provides support to neurons. Glial cells not only provide physical support, but also respond to injury, regulate the chemical environment of neurons, form the myelin insulation of nervous pathways, help guide neuronal migration during development, and play an important role in the blood-brain barrier. Glial cells come in four main types:


· astrocytes
· oligodendrocytes
· ependymal cells
· microglia