Brain Explosion

I've been looking for information on the genes that caused the following:

"The apes that ultimately evolved into humans enjoyed survival advantages over those of their cousins who had not inherited genes for the Great NeoCortical Leap Forward. That is, in hominid evolution, those apes with the greatest cognitive advantage were able to survive, proliferate, and outnumber their rivals."

The brain explosion that enabled Homo sapiens to predominate over hominid rivals involved expansion of the neocortex, particularly the frontal lobes.