Radial glia cells are best described as which of the following?

Radial glia cells are best described as which of the following?

• A. Early neuroepithelial cells that share some glial characteristics
• B. Mature neurons dedicated to signaling
• C. Astrocytes derived after birth
• D. Ependymal cells lining ventricles

Answer: (A)

Radial glia are the neural progenitor cells that drive CNS development. They originate from the early neuroepithelium and take on glial-like properties while their long processes span from the ventricular surface to the outer brain regions. This position and behavior let them serve as both the source of new neurons and glia and as a scaffold that migrating neurons use to reach their proper destinations. They are not mature signaling neurons, nor are they simply postnatal astrocytes, and while they can give rise to ependymal cells and astrocytes, their defining feature during development is being early neuroepithelial cells with glial characteristics that guide development.

Radial glia are the neural progenitor cells that drive CNS development. They originate from the early neuroepithelium and take on glial-like properties while their long processes span from the ventricular surface to the outer brain regions. This position and behavior let them serve as both the source of new neurons and glia and as a scaffold that migrating neurons use to reach their proper destinations. They are not mature signaling neurons, nor are they simply postnatal astrocytes, and while they can give rise to ependymal cells and astrocytes, their defining feature during development is being early neuroepithelial cells with glial characteristics that guide development.