After three months of treatment and therapy, psychological and neurological exams at Boston's McLean Hospital, the training ground for Harvard University medical students, Dolphins wide receiver Brandon Marshall believes he's finally at the root of his struggles after being diagnosed with borderline personality disorder, or BPD. "BPD is a well understood psychological disorder. It's not a form of misbehavior," said Mary Zanarini, a professor of psychology at Harvard Medical School, who treated Marshall this summer. BPD is a mental illness that studies say is more common than schizophrenia and bipolar disorder, but is rarely diagnosed because of misperceptions in the mental health community, and the challenges of providing a proper treatment plan. Marshall has informed the Dolphins of his diagnosis and said he is revealing his story with the goal of creating more awareness of BPD and advocating for better treatment and medical coverage for a treatment program that cost him $60,000. "By no means am I all healed or fixed," Marshall said, "but it's like a light bulbs been turned on in my dark room." Source: Orlando Sentinel
I believe herschel walker has a similar disorder, but he knows how to recall his other personalities.