31. The human brain is composed of neurons, glial cells , neural stem cells and blood vessels. 32. glial cells ) and activation of the microglia ( another type of glial cell ).33. Tlx is also required for transition from radial glial cells to astrocyte-like neural stem cells. 34. Glial cells are known to be capable of mitosis.35. As of 2011, research is focused on the two-way communication between neurons and glial cells . 36. Glial cells ) and activation of the microglia ( another type of glial cell ). 37. Specifically, esophagi had impaired smooth muscle contractility with reduced neuronal innervation and enteric glial cell numbers. 38. For example, glial cells , which are not considered neurons, play an essential role in information processing. 39. Glial cell line-derived neurotrophic factor has been shown to GFRA2 and GDNF family receptor alpha 1.40. The NG 2 glial cells express AMPA receptors.