Tens of millions of people worldwide suffer from neurodegenerative diseases such as Alzheimer’s, Parkinson’s, multiple sclerosis, and Lou Gehrig’s disease — but no effective treatments exist for these conditions. Research Scientist Anna Jagielska of the MIT Department of Materials Science and Engineering thinks repairing the myelin wrapping around axons is key to preserving neurological function and slowing or stopping neurodegeneration. Her team, with support from the MIT Deshpande Center for Technological Innovation, the U.S. Department of Defense, Sanofi-Genzyme, and others, is developing artificial axons using advanced 3D printing, in the…