I imagine that the only way to understand zombie psychology would be to eat the infiltrated brain of flesh and blood craving of a zombie. But, ironically, this ability to understand others via the stomach only occurs among zombies, so that all of you are unable to understand the deep meaning of a zombie's thoughts, if any. There is also another reason for this disability: zombies do not exist.
Well, what we could grant that zombies exist on the metaphorical level: rotten-brain people who are unable to change their minds, take on new ideas, destroy old traditions. There are zombies in the sense that there are people living biologically but dead mentally and morally. To a greater or lesser extent, we are all zombies.
Cinematic zombies are not the true creatures of horror. The real horror is nature itself, capable of conceiving terrible diseases that remind us of zombie suffering. As a mental disorder called Cotard syndrome or zombie syndrome. Those who suffer from it, in fact, feel like zombies, experience that their soul has abandoned them or that their body is degrading, decomposing, or even that they have already died.
The disease was first described by the neurologist Jules Cotard in 1880. In the words of the popular neurologist Vilayanur S. Ramachandran:
It is a disease in which a patient claims that he is dead, claiming that he smells like rotten meat or that he has worms sliding on his skin.
Some who suffer from this syndrome may also present suicidal behaviors: believing that they have already died, they don't care about anything, they are considered "immortal." Like dead walks. In the world of insects there is also a kind of zombification, as reported by the disseminator José Ramón Alonso in his book Charles Darwin's nose:
The emerald wasp, Ampulex compresssa, injects a venom into the cockroach's nervous system; then guide the insect (drugged by neurotoxin) to its burrow, where it plants its eggs in the abdomen of the unfortunate victim. The toxic injection causes the cockroach to not move (hypokinesia) and change its metabolism to store more nutrients. All this, so that when the wasp larvae are born they have food and devour the cockroach that, by the way, stays alive throughout the process.
But all these zombies, insects or humans, even fictional zombies, bloody and bloody, are not as scary as the figurative zombies that I pointed out at the beginning. The zombies of mind. And the worst part is that all of us are zombies of this class at some point in our lives.
Because, although we believe that our life is based on a series of reflected and weighted personal decisions, our brain usually goes a little to its own way, also when it comes to drawing fast conclusions, to believe of ears, to admit leaders, to stumble upon cognitive biases, and a whole list of design errors of our troglodyte brain. Or zombie.
So watch out for zombies, the real ones: at the slightest hint, run away from them. And also of yourselves.