Ragnhildur Thóra Káradóttir is director of the MS Society Cambridge Centre for Myelin Repair. She studied Biochemistry in Iceland, obtained her PhD in Neuroscience at UCL with Prof. David Attwell, and was awarded a Royal Society Dorothy Hodgkin Fellowship and a Wellcome Trust Career Development Fellowship. She has since received several prestigious awards, including the Lister Institute Research Prize, the Allen Distinguished Investigator Award, and an ERC Consolidator Grant. She is also a member of the FENS-Kavli Network of Excellence and winner of the Fabiane Carvalho Miranda International Prize. Her research focuses on how neuronal activity regulates OPC differentiation and myelin plasticity in health and disease, and more recently on changes in myelin and repair across the lifespan.