Karen Kenny was reported to be "very stable" and "much brighter" in hospital on Sunday following a fall at Tramore on Saturday.
The 7lb claimer was knocked unconscious when she was unshipped from Our Pearl two furlongs from home in the opening mile-and-a-half maiden.
Kenny was airlifted to Cork University Hospital, from where she underwent a brain scan, which revealed what was described as a "small subdural haemorrhage".
Dr Adrian McGoldrick, senior medical officer for the Irish Turf Club, said: "She's very stable this morning and she's being observed for the time being. There's no indication to operate on her.
"She's much brighter and very stable.
"She's much better than she was yesterday, they are are very happy with her and will continue to observe her for the time being."
Chris Hayes fell from Columbanus earlier in the race but he returned to the weighing room after the incident.
Dr McGoldrick said: "Chris is fine. He went for X-rays, but there's no fracture. He's absolutely fine."