What causes zombification? Some mixture of schizophrenia, mistaken identity, a poison powder called tetrodotoxin, and amnesia. Mind Hacks writes:
We hear a lot about zombies these days, but many are unaware that in 1997 The Lancet published a medical study of three genuine Haitian zombies. The cases were reported by British anthropologist Roland Littlewood and Haitian doctor Chavannes Douyon and concerned three individuals identified as zombies after they had apparently passed away.
The Haitian explanation for how zombies are created involves the distinction between different elements of the human being – including the body, the gwobon anj (the animating principle) and the ti-bon anj, which represents something akin to agency, awareness, and memory.
In line with these beliefs is the fact that awareness and agency can be split off from the human being – and can be captured and stored in a bottle by a bòkò, a type of magician and spirit worker who can be paid to send curses or help individuals achieve their aims.