Star Tasmanian jockey Raquel Clark was taken to hospital for scans after a nasty fall at Morphettville on Saturday.
Racing.com reported that Clark's mount in the seventh race, Goodgee, clipped the heels of another horse and fell as it was being eased down about 400m after the finish line.
Other jockeys said that Clark's mount then rolled over the top of her.
Clark was conscious as she received medical attention on the track.
Fellow jockey Jake Toeroek later posted on Facebook: "We are currently with Raquel (at the hospital) - she is stable and awaiting scan results. She's pretty bombed out with pain killers but is chatting away and is frustrated she couldn't ride in the last. All positive signs."