A Glasgow man in his 60s has become the world's first person to receive injections of foetal stem cells into the brain in order to repair damaged nerve tissue caused by stroke. Doctors who carried out the surgery over the weekend said they do not expect to see any immediate improvement in the man's partial paralysis, as the clinical trial is aimed primarily at testing the safety of the controversial procedure. Professor Keith Muir, the principal investigator on the trial, said that foetal stem cells offer a potential new therapy for the thousands of people each year who suffer permanent disabilities caused by brain damage resulting from blocked blood vessels or internal bleeding.