Genetics Laboratory (IMAGE) Washington University School of Medicine Caption Washington University graduate student Janet Cady and assistant professor of neurology Matthew Harms, M.D., found evidence that genetic mutations may contribute to more cases of amyotrophic lateral sclerosis (ALS) than scientists had realized. The illness destroys nerve cells that control muscles, eventually leading to paralysis and death. Credit Michael C. Purdy Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.