Guinevere Eden, D.Phil., director for the Center for the Study of Learning at Georgetown University Medical Center (GUMC) and her colleagues report on a new structural brain imaging study that shows, in addition to deafness, early language experience – English versus ASL – impacts brain structure. Half of the adult hearing and half of the deaf participants in the study had learned ASL as children from their deaf parents, while the other half had grown up using English with their hearing parents.