Before revision:   Our study shows that the underlying topology in neural networks is significantly qualitatively different than the same from other biological networks and  they may have evolved  such a way that they inherit a  structure which is excellent and robust in communication.
After revision:  Our study shows that the underlying topology in neural networks is significantly qualitatively different than the same from other biological networks and they may have evolved such a way that they inherit a (undirected) structure which is excellent and robust in communication.