<Tr> <Td> CNS </Td> <Td> Radial glia </Td> <Td> <P> Radial glia cells arise from neuroepithelial cells after the onset of neurogenesis . Their differentiation abilities are more restricted than those of neuroepithelial cells . In the developing nervous system, radial glia function both as neuronal progenitors and as a scaffold upon which newborn neurons migrate . In the mature brain, the cerebellum and retina retain characteristic radial glial cells . In the cerebellum, these are Bergmann glia, which regulate synaptic plasticity . In the retina, the radial Müller cell is the glial cell that spans the thickness of the retina and, in addition to astroglial cells, participates in a bidirectional communication with neurons . </P> </Td> </Tr> <P> Radial glia cells arise from neuroepithelial cells after the onset of neurogenesis . Their differentiation abilities are more restricted than those of neuroepithelial cells . In the developing nervous system, radial glia function both as neuronal progenitors and as a scaffold upon which newborn neurons migrate . In the mature brain, the cerebellum and retina retain characteristic radial glial cells . In the cerebellum, these are Bergmann glia, which regulate synaptic plasticity . In the retina, the radial Müller cell is the glial cell that spans the thickness of the retina and, in addition to astroglial cells, participates in a bidirectional communication with neurons . </P> <Tr> <Td> PNS </Td> <Td> Schwann cells </Td> <Td> <P> Similar in function to oligodendrocytes, Schwann cells provide myelination to axons in the peripheral nervous system (PNS). They also have phagocytotic activity and clear cellular debris that allows for regrowth of PNS neurons . </P> </Td> </Tr> <P> Similar in function to oligodendrocytes, Schwann cells provide myelination to axons in the peripheral nervous system (PNS). They also have phagocytotic activity and clear cellular debris that allows for regrowth of PNS neurons . </P>

Which of the following is a function of the neuroglia