Thomas Insel, the director of the National Institute of Mental Health, wonders: Could we do the same for depression and schizophrenia? The first step in this new avenue of research, he says, is a crucial reframing: for us to stop thinking about "mental disorders" and start understanding them as "brain disorders."
Source: ted.com
http://www.ted.com/talks/thomas_insel_toward_a_new_understanding_of_mental_illness