Sharon Stone has revealed that she suffers from seizures if she doesn’t get eight hours of sleep a night.The Basic Instinct star was given a one percent chance of survival after she suffered a bleed on her brain in 2001. The actress has been taking medication ever since, but admits she’s lost out on a lot of work due to her condition.“I’ve become more comfortable with publicly saying what’s really happened to me now,’ she told People magazine. “For a long time I wanted to pretend that I was just fine.”She continued: “I need eight hours of uninterrupted sleep for my brain medication to work so that I don’t have seizures.