Scientists have developed a tool they say is able to briefly restore circulation and some brain activity — but not consciousness or global electric functions — in the brains of pigs 4 hours after death. Very Colorful!
*Why it matters
[axios.com]pig-brain-cells-hours-after-death-7816e4ad-170a-47d4-a266-0c9378c63e45.html
My read, it slows neural activity allowing other functions to go on longer. Probably useful just after brain injury.
Also a good step towards zombies! Yay! Apply to living human, decreased brain activity but other functions can go longer.