My Father (96 Years Old) Had A Bad Fall 4

My father (96 years old) had a bad fall 4 weeks ago and hit his head on concrete. He broke his nose and had stitches in one eye. They did a CT scan - outcome was OK. He had bad headaches, then became extremely fatigued, to the point now where he cannot move his legs (this happened first) and now his arms. He has now been admitted to hospital where they will carry out further tests. If this paralysis is due to the MTBI he suffered, will it get better? Given that he is 96 and already frail (had a kidney removed 2 years ago for kidney cancer). Are they able to treat it?