New To Amnesia

My wife, Judy is a nurse. She fell at work a week ago and hit her head on the concrete floor. She received a a very bad concussion. She has had all the tests one would have if one had a very severe concussion. She is now at home, but has no recall of family and friends. Some things come back to her in bits and pieces and that's about it. For instance she overheard me say the name of a street and said she recalls hearing the name before.

I just want to do the right things to assist her in getting her memory back, but I don't know what those things are.

Any help will be greatly appreciated.