UPDATE: A further statement was provided once Valentino Rossi had left hospital.
Valentino Rossi escaped serious injury in Sunday's Aragon MotoGP accident, but remains under observation.
Rossi was putting pressure on Dani Pedrosa for third place early in the race when he ran off track in a downhill section. He then highsided from his Movistar Yamaha - sending bike and rider tumbling roughly to a halt.
The Italian, winner of the previous Misano round, was taken away on a stretcher, heading first for the circuit Medical Centre and then a CT scan at Alcaniz hospital. The seven time MotoGP champion's physical condition will be checked again by the Clinica Mobile later today.
Michele Zasa, Clinica Mobile Medical Director, said: “Valentino suffered a concussion with a suspected loss of consciousness. From a neurological point of view he has recovered very well.
“He was taken to hospital in Alcaniz to make a further check, in particular a CT scan of the skull that has ruled out any bleeding in the brain. As a precaution he will be observed in the coming hours, but there are no special reasons for concern.”
Movistar Yamaha team director Massimo Meregalli added: "Vale was riding very well up to his crash, it's a pity because after his out lap he said the changes we made were perfect and he felt the bike was working well.
"We are not clear yet on the cause of the crash but he was clearly riding with potential to finish on the podium. Fortunately he seems to be fine and has been taken to the hospital as a precautionary check up following an initial check at the Medical Centre."
Rossi had closed to within one point of Pedrosa and second in the world championship prior to Sunday's race. However Pedrosa also made a mistake late in the race and the pair are now separated by only three points with four rounds remaining.
The Italian's team-mate Jorge Lorenzo won the race, which saw late bike swaps due to steadily increasing rain.
The next round of the championship takes place at Motegi, Japan on October 10-12.