Robert Thornton is in a "stable" condition after suffering a terrible fall at Leicester yesterday.
The 31-year-old jockey was riding Cracboumwiz for his boss, Alan King, in the Dick Christian Novices' Chase when he sustained a suspected back injury.
Cracboumwiz appeared to be getting the better of 2/5 market leader The Polomoche, but Thornton came down in dramatic fashion at the third-last fence. Thornton, one of the leading National Hunt jockeys across the water, initially tried to get to his feet, but was taken into an ambulance on a stretcher before being shipped to Leicester Royal Infirmary Hospital.
He will remain in hospital overnight for further observation.
A hospital spokesperson said: "At the moment he is in our emergency department and is stable and awaiting x-rays."
Meally Thornton, the jockey's wife, is hopeful her husband's injuries are not too severe.
She said last night: "I'm heading there (Leicester Royal Infirmary) now and they are waiting for the x-ray results.
"He's going to be kept in hospital overnight but I don't think it's really serious.
"(Fellow jockey) Andrew Tinkler has been in to see him and he (Thornton) is strapped onto a back-board.
"I think it's a back injury, but the people at the hospital have been unable to tell me anything."
Leicester clerk of the course Jimmy Stevenson said of the incident: "He (Thornton) was put on a spinal board before being put in the ambulance and all the doctor told me was that it was a suspected back injury.
"He'll have all the tests done at the hospital and he's in good hands."