Good overview of what that sort of thing would take and what was known and unknown: https://www.fhi.ox.ac.uk/brain-emulation-roadmap-report.pdf https://www.fhi.

Good overview of what that sort of thing would take and what was known and unknown: https://www.fhi.ox.ac.uk/brain-emulation-roadmap-report.pdf https://www.fhi.ox.ac.uk/brain-emulation-roadmap-report.pdf (2008. Of course there's been related work since, but I don't know of any attempt to review all the newer stuff together.)