His new book is called Altered Egos: How the Brain Creates the Self. What is the self? and what is the relationship between the brain and selfhood? Feinberg uses the stories and interesting cases of his patients to try and answer these questions from a neurological and psychological standpoint. Feinberg claims that the way patients with brain damage or disorders like alien hand syndrome talk about themselves can tell us a lot about how the brain creates itself. Dr Feinberg is assoicate professor of Neurology and Psychiatry at the Albert Einstein College of Medicine and Chief of the Betty and Morton Yarmon Division of Neurobehavior and Alzheimers Disease at the Beth Israel Medical Center of New York.