A brain injury specialist has warned that if Michael Schumacher survives after his skiing accident "he will not be Michael Schumacher".
French doctors have begun tests on the seven-time Formula 1 world champion, who has been in an artificially induced coma after his head struck a rock while he was skiing off-piste in Meribel in France.
He has had an operation to remove a small part of his skull in a bid to relieve pressure on his brain but he remains in a critical condition.
Dr Richard Greenwood, an acute brain injury specialist from University College London Hospital, this week said successful rehabilitation would mean adjusting to a very different life.