Which neural layer gives rise to glioblasts?

Which neural layer gives rise to glioblasts?

• A. Ventricular layer
• B. Pial surface
• C. Subventricular zone
• D. Outer cortex

Answer: (A)

Glioblasts are glial progenitor cells that ultimately differentiate into astrocytes and oligodendrocytes. Their formation mainly occurs in the subventricular zone, a germinal layer just outside the ventricular zone. Early in development the ventricular (ventricular) zone is a primary site for neural progenitors that create many neurons, but as neurogenesis winds down, glial progenitors expand in the subventricular zone. From there, glioblasts give rise to glial cells and migrate to their eventual positions in the brain. The pial surface and the outer cortex aren’t sources of these progenitors, which is why the subventricular zone is the correct origin for glioblasts.

Glioblasts are glial progenitor cells that ultimately differentiate into astrocytes and oligodendrocytes. Their formation mainly occurs in the subventricular zone, a germinal layer just outside the ventricular zone. Early in development the ventricular (ventricular) zone is a primary site for neural progenitors that create many neurons, but as neurogenesis winds down, glial progenitors expand in the subventricular zone. From there, glioblasts give rise to glial cells and migrate to their eventual positions in the brain. The pial surface and the outer cortex aren’t sources of these progenitors, which is why the subventricular zone is the correct origin for glioblasts.