Glia constitute a support system for neurons.
Neurons process and carry information from one neuron to the next, or between neurons and muscles. In addition, glia act as substrates for neural migration. Developmental biology of glia Glia origins and diversity mirror that of the neurons they accompany. Other CNS and brain glia are derived from the same neuroblasts that give rise to neurons. Midline glia have a separate mesectodermal origin, being derived from midline neuroblasts.