I'm sorry to hear about your friend's problems. Brain injury is highly individual, so there is no "blanket" statement about what she should expect. She will need to be evaluated by a neurologist, if she has not been already. The doctor who performs her evaluation is in the best position to advise her. If she is not satisfied with that, she could look into the possibility of being tested by a neuropsychologist, which is a psychologist (not a medical doctor) who specializes in testing the mental abilities of people who have suffered from brain injury. Best wishes for your friend's recovery.