Where are radial glia cells located in the developing nervous system?

Where are radial glia cells located in the developing nervous system?

• A. They span most of the wall of the early neural tube
• B. They are restricted to the dorsal spinal cord
• C. Only at the ventral neural tube
• D. Only in the cortex

Answer: (A)

Radial glia act as both neural progenitors and a migration scaffold in early CNS development. Their processes stretch from the ventricular (inner) surface to the outer pial surface, spanning most of the neural tube wall. This arrangement provides a radial path for newly born neurons to migrate to their target positions, so these cells are located across most of the neural tube wall rather than being confined to a single region like the dorsal spinal cord, ventral neural tube, or cortex.

Radial glia act as both neural progenitors and a migration scaffold in early CNS development. Their processes stretch from the ventricular (inner) surface to the outer pial surface, spanning most of the neural tube wall. This arrangement provides a radial path for newly born neurons to migrate to their target positions, so these cells are located across most of the neural tube wall rather than being confined to a single region like the dorsal spinal cord, ventral neural tube, or cortex.