Seve Ballesteros remained in intensive care on Wednesday but is showing signs of improvement, La Paz hospital confirmed.
The 51-year-old five-time major winner has had two operations on his brain since the diagnosis of a tumour earlier this month and is being kept under sedation.
A spokesperson for the Madrid hospital said: "They let him wake up for a short while.
"He reacted well and then they put him back under sedation again.
"As hours go by it means a bit of recovery."
BALLESTEROS RECOVERING WELL
Jets LB Pace questionable, but expects to play