Human brain the largest cells (by size of cell body) in the nervous system. The adult human brain is estimated to contain 86±8 billion neurons, with a roughly equal number (85±10 billion) of non-neuronal cells. Out of these neurons, 16 billion (19%) are located in the cerebral cortex, and 69 billion (80%) are in the cerebellum. Types of glial cell are astrocytes (including Bergmann glia), oligodendrocytes, ependymal cells (including tanycytes), radial glial cells and microglia. Astrocytes are the largest of the glial cells. They are stellate cells with many processes radiating from their cell bodies. Some of these processes end as perivascular
Perisynaptic schwann cells These proteins are seen in other glial cells such as Myelinating Schwann cells and Neural Crest cells. While the lineage of non-Myelinating Schwann cells is known from neural crest cells, the exact development of PSCs from non-Myelinating Schwann cells is not fully understood. Synaptogenesis is the formation of a synapse and in this case the Neuromuscular Junction is of interest. In this section, the focus is on the development of the NMJ from the outgrowth of axons during development. As mentioned in the development section, Schwann cell precursors accompany growing axons as they reach their associated muscles. It is now