https://www.scientificamerican.com/article/real-life-zombies/

Maybe the zombie apocalypse starts with a virus or a supernatural event. Maybe the resulting zombies can move quickly but are more easily incapacitated, or maybe they’re slow and can be only taken out by a blow to the brain. Are these zombies cunning? Or are they awkward and uncoordinated, as I would argue any proper zombie must be? 

Zombie lore may give us a lot of variety, but one thing every zombie scenario has in common is reanimation of the body after death. The body’s movements are slave to a brain that is no longer in control. But what do these differences matter? It’s all just science fictional horror movie fodder, right? Well, we’ve previously discussed scientific studies on how fast a zombie-like virus could spread, as well as neurobehavioral disorders in humans that leave their sufferers mimicking some key zombie traits. And it turns out, science has even more to say about zombies.