Hmmm I wonder if the neurological problems are due to the cannibalism or because the practice mainly exists within small, isolated communities with very little contact with the outside world (inbreeding) and a limited diet as well. If they had access to other types of meat and an otherwise balanced diet, with human meat added in, I wonder if the neurological problems would still develop. Now I'm intrigued... I'll have to ask my husband. He's an anthropologist.