Neurolgia is obtained from one of the primary cell layers responsible for creating the neurons- the ectoderm. It has six categories: oligodendrocytes, neurolemmocytes, microglia, ependymal, astrocytes and ganglionic gliocytes. Take a look at the characteristics of each.
Oligodendrocytes - It has the same role with the neurolemmocytes, except for the fact that it works in the central nervous system.
Microglia - It aids in the debris removal that could be seen in the central nervous system.
Astrocytes - They aid the molecules and cells to pass by between the central nervous system, or CNS to the brain.
Ganglionic Gliocytes - It gives support to the cell bodies in the preipheral nervous system, or PNS.