Question

many new neural tube cells migrate radially: to the ventricular zone from dendrite to dendrite along radial glial cells in the visual cortex along axons of other neurons

Explanation:

Neural tube cells migrate radially along radial glial cells. Radial glial cells serve as a scaffold for neuronal migration during development. The ventricular zone is where cells are generated, not where they migrate to for final positioning. Migration from dendrite to dendrite is not a typical mode. While the visual cortex has neurons, the general mode of radial migration is along radial glia. Migration along axons of other neurons is not the radial migration pattern described here.

Answer:

along radial glial cells