Professor James Gusella and Professor Marcy MacDonald are genetic scientists from Harvard University who are working to find therapies to treat neurodevelopmental disorders, especially Autism Spectrum Disorders. They discuss the role that a person's genetic makeup plays in the development of nervous system disorders and how certain gene mutations can help to predict developmental degenerative disorders. James Gusella and Marcy MacDonald are visiting the as Freemasons Travelling Scholars. They will hold a public meeting on nervous system disorders at the Faculty of Medical and Health Sciences on Tuesday 22 March.