Sharon Stone's speech and mobility could be affected by her recent haemorrhage.
She was taken to hospital after suffering bleeding into the space between the brain and the middle membrane covering the brain.
Experts say she is most at risk of complications during the next two weeks.
Dr George Teitelbaum, a neurosurgery expert who is not treating Stone, told the press that strokes, seizures and the loss of mobility, speech, vision and memory were among the complications that could occur.
The risk will be significantly reduced if she gets through the next two weeks without any major complications, says Dr Teitelbaum.
Stone has been undergoing tests in hospital and is due to undergo an angiogram, an examination of blood vessels using X-rays.
