Gamble

It had been a gamble. The fact that Marcus's body jumped for an instant off the floor was nothing surprising. Muscles, even apparently dead ones, respond to electrical stimulus. The fact was that Marcus really was dead, but he was still 'fresh meat' due to the refrigeration.

Whilst clearly his kinetic functions could not be sustained on their own without external impulses, it turned out that all his cognitive functions needed was some small electric current to reactivate them. Of course, they were useless without the other workings of the body, except to the machine!

Then the download started. Bingo!