John Fink and Shirley Rainier (IMAGE) Michigan Medicine - University of Michigan Caption University of Michigan scientists John Fink and Shirley Rainier found mutations in one gene account for one form of motor neuron disease and possibly play an important role in others. Credit U-M photo 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.