Reductionist biology–examining individual brain parts, neural circuits and molecules–has brought us a long way, but it alone cannot explain the workings of the human brain, an information processor within our skull that is perhaps unparalleled anywhere in the universe. We must construct as well as reduce and build as well as dissect. To do that, we need a new paradigm that combines both analysis and synthesis.
See the article here:
A Countdown to a Digital Simulation of Every Last Neuron in the Human Brain (preview)