http://www.nih.gov/news/health/mar2012/nimh-29.htm has images of human and monkey brain scans which reveal an amazingly grid-like pattern of neuronal connections. What are the implications? Could brain scanning, emulation etc be simpler than would appear from images of tangled up neuronal cells (eg here: http://www.willamette.edu/~gorr/classes/cs449/brain.html)?
(My mother is a retired neuroscientist... I'd ask her for comment, but she is on holidays.)