More sophisticated wiring, not just bigger brain, helped humans evolve beyond chimps

http://medicalxpress.com/news/2012-08-sophisticated-wiring-bigger-brain-humans.html

Yet more evidence that the human brain is not only bigger than that of the chimp but better. Dan Geschwind and colleagues in LA have been looking at gene expression particularly in the pre-frontal cortex and find much more complex patterns of gene expression there.

""When we looked at gene expression in the frontal lobe, we saw a striking increase in molecular complexity in the human brain," said Geschwind, who is also a professor of psychiatry at the Semel Institute for Neuroscience and Behavior at UCLA.