[quote name='SpazX']You can slow decomp, but you need something to coordinate muscle movements to make anything like a zombie. Not only would there have to be some kind of source of electricity (if they could eat and digest things then that could be the source, but that would require at least lower-level brain function), there would have to be something to relay it to the limbs in a coordinated fashion in order to do anything but twitch.
The spinal column can control movements and basic reactions (so if you hit a Zombie's knee at the tendon it would kick), but not anything complex like walking. Not only do you have to control the legs in a rhythmic fashion you have to be able to balance your body and both of those require a functioning brain.[/quote]
Like I said, an electro-chemical agent that could allow brainstem and lower level functioning could be synthisized.
Muscle memory is also something to take into consideration. You body muscles would on some level "know" how to walk. (Muscle memory is a complicated thing, and we don't fully understand it yet).
Zombies (of course) won't be like in the movies. That's my point, we NEVER KNOW!!!
It pays to be prepared though!
PP