Scientists say they have slowed and even reversed some of the devastating and relentless decline caused by motor-neurone disease (MND). The treatment works in only 2% of patients but has been described as “truly remarkable” and a “real moment of hope” for the whole disease. One leading expert said it was the first time she had seen patients improve – but this is not a cure. The MND Association said there was “mounting confidence” in the therapy. MND, also known as amyotrophic-lateral sclerosis (ALS), is caused by the death of the nerves that carry messages from the brain to people’s muscles. It affects their ability to move, talk and even breathe. The disease dramatically shortens people’s lives and most die within two years of being diagnosed.