The recent study done by DARPA to uncover mysteries of human intelligence, approaches the subject from a different perspective. The study seeks to model how intelligence works by creating a new theory that is based on principles of thermodynamics. The laws of thermodynamics deal with the total energy within any given closed or open system, and it relates the work done and the heat produced to the total energy. For more, please visit the link below.
The approach of reverse engineering the human brain seems the most promising to reach the goal of strong AI. Back in the early days of computers, it was assumed that once the computers had enough computational power, the AI would naturally emerge, but that now appears to be untrue. The complex mechanisms of human brain need to be modeled in order to reach that goal.