Even if individuals survive a traumatic brain injury (TBI), there is a chance they will encounter a range of complications while recovering from this condition. For instance, the National Institute of Neurological Disorders and Stroke states that TBI patients may develop behavioral problems and undergo personality changes during this period.

In some cases, a TBI can lead to the development of an entirely different personality. This is what happened to 6-year-old Zoe Rain Bernstein, who fractured her skull when her father’s pick-up truck slammed into a light pole, The Week reported. Following a month-long coma, Bernstein awoke with what her mother views as a "completely different" personality.

After relearning how to talk, eat, brush her teeth and put on her shoes, Bernstein appeared to be a whole new person. In addition to possessing behavioral problems that she never had before, the young girl has also developed attention deficit disorder.

As behavioral problems have a habit of surfacing in TBI patients, individuals who have survived a serious blow to the head may want to take a personality test and see just how much they have changed.