The dorsal part of the nervous system typically gives rise to sensory structures, and the ventral part gives rise to motor structures. Because the central sulcus marks such a functional boundary, I had assumed it was an example of this zonation ... however, recently I didn't find any source to defend this position. (I would have been sure that hunting for "fate map" and "central sulcus" would pull up something informative...) Some of the embryology, in which I think a trace of a central sulcus might be apparent quite early, can be seen at UNSW, but none of the embryology images I considered really seem usable to answer the question.
*Note: "Central sulcus" is referenced as a visible marker for the boundary between motor and sensory functions. Answers that trace the origin of this boundary in species where it is not marked by a sulcus are also welcome.